A young mother is sexually assaulted and killed in her home, the killer was meticulous in washing everything, but left behind a single hair.
A mask is discovered near the crime scene and police are hoping that it will lead to the killer of a funeral director.
When a young woman disappears, police think an abusive ex-boyfriend is to blame.
A woman goes missing amidst a contentious divorce.
A high school student disappears, then a prostitute is murdered causing police to believe they may be linked.
A real estate developer is shot and his wife becomes the prime suspect, until the bullet is linked to a weapon reported missing 20 years ago.
A community is shocked when police discover a woman raped and murdered in broad daylight on a public trail.
The killer removed the computer that links him to the murder of a woman and her soon-to-be ex-husband that he had met online.
A young college student is found dead in her apartment and the autopsy rules the death a homicide by an unknown male suspect.
Four young adults are murdered and the crime scene yields little results, until a neighbor reports seeing two people in black the night of the crime.
An Ohio woman and her two daughters go missing while vacationing in Florida; their corpeses are found floating in Tampa Bay with a hand-written note by one of the victims by. putting it on five billboards to helps them find the killer.
Community searches deliver devastating results when a teenage girl goes missing, investigators begin hunting a killer.
A young bride-to-be is gunned down in her own home; the attack is personal and as investigators start digging, they uncover the man she loved was living a lie.
A dismembered body is dumped on the side of the New Jersey Turnpike and before police realize it, bodies are turning up between two states.
A man is found dead of an apparent slow suicide but information emerges which reveals that his wife may have had a more prominent role in his death, especially since her first husband died so young and she refused to consent to an autopsy.
A husband saves his wife and child from a burning trailer, but one month later she is killed in her sleep, all evidence leads to the husband.
A man perishes in a fire while working in his garage and his death is initially ruled an accident until a Forensic Odontologist changes the direction of the case.
A church member is gunned down after leaving choir practice; witnesses see little and evidence is scarce, but investigators learn that she had been having affairs for years.
A woman has an accidental fall down a flight of stairs and looks to have hit her head, but the lack of blood splatter and misplaced shoes lead police to believe that the fall was staged.
Evidence that includes threatening emails, a missing person and an abandoned truck lead police to what they believe is a killer, but they don't have the body of the victim.
After years of suffering domestic abuse, a young woman is found murdered in her bathtub; the clues are all over but th eclincher is a hamburger bun; the Christina Sanoubane case.
The search for a missing exotic dancer led police to an isolated 75-acre site where someone had been shot and cremated thus destroying all evidence...almost; piece of a foot provided enough DNA for a genetic profile, and positive ID.
A quiet waitress who hasn't been to work in two days, vanishes without a trace; police suspect a date gone wrong.
Cold case detectives are baffled by the murder of a young housewife.
A couple embarks on a traditional holiday but never return.
The absence of a woman's body complicates a murder investigation.
The brutal murder of a state park employee over $2,000 rattles her co-workers and tourists while leaving police to sift through hundreds of leads.
After a woman is found dead at a yacht club in California in an apparent case of love gone wrong, investigators discover her home life was as dramatic as films made in nearby Hollywood.
A masked gunman kills two members of a family and wounds two others after they interrupt his burglary at their upscale suburban home.
A 12-year-old is the only witness to her mother's death and is unable to provide investigators with many details in Maine.
All signs point to a professional hit after an attractive young couple is found slain at home in Graham, Wash.
After a prominent Arizona surgeon is found stabbed to death outside his office, investigators uncover an unlikely suspect with deep pockets and an even deeper hatred for the doctor.
A wild fire in a secluded parking lot leads police to discover a dreadful homicide, with the suspect's image caught by security cameras.
Police use the latest scientific and forensic techniques to identify the killer of a convenience-store clerk whose bound, half-naked body was found in woods following a robbery at the shop almost twenty years previously
Forensics investigate a clever inside job, in which finger prints, CCTV and DNA testing provide the keys to catching a thief and killer.
Investigators face a growing list of suspects after a beautiful flight attendant is brutally murdered in her own home.
Weeks after a student vanishes, the body of an unknown female is found in the ashes of a fire 700 miles away; an alert policeman realizes the crimes could be connected.
Unsettling evidence is found in the rubble from a fire in a Seattle woman's apartment that is soon followed by another blaze just 100 feet from the first, with clues indicating a serial killer is at work.
After a habitual runaway is found dead, with a single foreign hair found, police suspect people she would turn to in a crisis.
How the latest scientific and forensic techniques can help solve puzzling crimes, focusing on the kidnapping and murder of 20-year-old student Megan Barroso in Moorpark, California. Vital clues were discovered when the victim's bullet-riddled car was found on a motorway
After a young scientist dies from a mystery illness, investigators discover evidence in his hair that might help identify his killer.
Man is found burned beyond recognition almost 100 miles from his home, and although police were able to identify his remains, they still had to determine the where, who and why.
Examining the use of modern scientific and forensic techniques in the investigation of the murder of University of Florida student Michelle Herndon in 2005. No clues were initially apparent, until a small needle mark was discovered on the victim's arm
A rare type of wire, a rhinestone dog collar and a hypnotist help detectives investigating a string of church bombings in Illinois.
DNA, ballistics and a six-pack of beer help solve who, of two roommates, murdered a high-priced call girl.
A couple is brutally attacked at home, leaving the husband dead, the wife gravely injured and their son as a prime suspect.
Witnesses see a woman in the back of a truck flailing her arms, screaming; after finding jacket near a pool of blood, they knew it wasn't a joy ride; it was an abduction.
Investigators try to prove foul play caused a woman to fall to her death during a family vacation; a forensic pathologist uses a groundbreaking technique to discover the truth.
Police launch a massive manhunt after a Kentucky businessman is shot and killed at home in front of his wife.
Forensic evidence leads police to a sadistic serial rapist after years of investigation in Delaware and Maryland.
Forensic investigators try to stop a killer who is apparently responsible for two slayings in a community in South Carolina.
A girl goes missing during a Fourth of July celebration, then turns up dead with seeds planting the only clue to the identity of her killer.
A woman heads home after church, but never makes it there alive, triggering a homicide investigation.
After a recently divorced mother is found brutally murdered in her apartment, detectives find a mismatched button and follow the thread back to her killer.
A community in Texas becomes paralyzed by fear while police try to identify the masked man behind a string of sexual assaults.
A college student turns up dead and her boyfriend becomes a prime suspect when blood splatters are discovered on his wall.
A nosy neighbor with a disturbing obsession becomes a suspect in a woman's murder at an upscale apartment complex; police discover an incredible link to an unrelated murder thousands of miles away.
A DNA dragnet catches a killer eight years after the kidnapping, rape and murder of a college coed in Oklahoma.
A family vacation turns into a terrifying search for a missing wife and baby, then becomes a manhunt for a killer who committed a horrific crime.
After a Delaware man's mother is found dead, he tells a story that's so improbable police think it can't possibly be true.
After a couple is attacked in their home, a bloody footprint on the kitchen floor seems to be the only clue left by the intruder, so the case becomes dormant for nearly two decades until an experimental test is tried.
A shooting victim mutters the name of her apparent assailant before dying, but fingerprint comparisons, handwriting analysis, ballistics and DNA testing show someone else close to home is the true killer.
The brutal murder of a construction site foreman looks like the work of a disgruntled employee, but forensic science points to an unlikely suspect.
After police identify a murder victim thanks to her butterfly necklace, they discover several co-workers had vendettas against the victim.
A female killer leaves police few clues to work with and escapes detection - until investigators are put on her trail when they hear of another crime committed years later and hundreds of miles away, in which an exotic dancer is alleged to have got away with murder
Naval officer who threatened to go public with tales of on-the-job sexual harassment and assault is brutally murdered, but when investigators find the allegations could be part of an elaborate scheme for money, they turn to forensic science.
A man discovers his father has been shot dead in their Minnesota home. Freshly fallen snow reveals an unidentified set of shoe prints, which seem to belong to the killer, but police investigators soon uncover a web of deception, greed and murder-for-hire
Documentary examining an investigation into the murder of a successful estate agent, revealing how police used forensic hypnosis to help a witness recall every detail of a suspect's appearance, before making a composite sketch of the man they believed to be the killer
How scientific and forensic techniques can help solve puzzling crimes. Detectives have to decide whether a businessman has been killed with malice aforethought or accidentally in the course of a bungled robbery
A college senior was found raped and murdered, two other students were killed in the same manner, forcing police to believe they had a serial killer.
Security guard who disappeared from his post was found a year later in a remote camp site; a decade later, a phone call and a paint smear on his boot helped scientists determine what happened during his final moments.
A woman's body is found inside a burned mobile home and the autopsy reveals she was beaten, making this a murder.
A killer places all the incriminating evidence to the murder in a plastic bag, hoping it will float down the river.
A human skeleton is found and determined to be at least 18 months old, an inventive computer consultant gives her a face and name.
Police investigate the possibility of a hate crime when two women go missing and are later found murdered.
After 10 years, a witness decides to do the right thing about the rape and murder of a young hairdresser.
A husband and wife are shot and their 16-year-old daughter was lucky to escape, or was it good planning.
When a single mother is murdered, her brother vows to find the person responsible for the death of his sister -- even if it takes more than 30 years.
A young woman is found murdered, two weeks after reporting a road rage incident. Evidence is leading not to the aggressive driver, but one of their own.
Police are unable to link any of the potential suspects to the murder of a young college student until years later with better technology.
A young girl beaten after watching her grandmother killed, identifies the wrong person, years later trying to change her statement.
Investigators see through a killer trying to cover his tracks by staging the crime scene to learn what really happened.
A canine behaviorist uses the family dogs, who are the only witnesses, to find the murderer of their owner.
A convicted arsonist claims his innocence and with no lawyer, no money and only a fifth-grade education, sets out to prove it.
Groundbreaking tests reveal the race, eye color and hair color of the person responsible for killing two young women on Halloween night.
The only lead to finding a serial killer on the loose is a bloody fingerprint on the body of a victim.
With a long list of suspects, forensic experts are clear on one thing in this brutal murder, the killer knew his victim.
Three fingerprints on a window screen are enough for a print examiner to uncover the work of a serial killer.
A pair of tennis shoes are found near a victim who had been stabbed on the beach, less than ten yards from her hotel.
A woman shot in her driveway had recently rejected a co-worker half her age.
When a man's wife kills herself 14 years after his college sweetheart committed suicide, police start to get suspicious.
After a Michigan State University grad student disappears and is presumed dead, a professor of geological sciences helps police get the 'dirt' on her killer.
Ten years after the murder of a rock singer, forensic scientists use evidence collected to finally bring her killer to justice.
An ATM transaction allows Texas detectives to pinpoint a suspect in the slaying of a teacher, but a shoelace stolen from the victim's home proves to be the tie that binds her killer to the crime.
A squashed tomato and a pinpoint reflection of light in a photo help catch a killer.
Casino security cameras offer images of a woman just before she disappeared.
When two men appear to die of heart disease six years apart, police notice they have one thing in common, they were each married to the same woman.
A man is found strangled and burned in his San Antonio apartment and the killer thinks he has destroyed all the evidence.
When a young girl is found dead, police quickly make an arrest, but could cutting-edge technology from NASA prove the wrong man is behind bars.
A used tissue, 12 years after the murder of a young Missouri woman, may be what cracks the case with a suspect list a mile long.
The kidnapping of Adolph Coors leads to one of the most intense manhunts in US history.
An ammunition box and fluorescent fibers reveal the betrayal that led to the murder of a millionaire's family.
When a house burns to the ground and a woman's charred remains are found, investigators must determine whether it was an accident or arson.
A wax bullet, white blanket and olive colored carpeting, tell a lot about the murder of a young woman found in a ravine.
When a man dies after falling down the stairs, a witness says one thing and the evidence says another.
A device intended to save lives proves to be the only witness to a mans death.
Twenty years after an unsolved murder, new forensic science is able to identify the killer.
How the bombs were made leads investigators in Colorado to find the perpetrator.
A woman is abducted and a month later found dead, then a tip leads investigators in the right direction.
A paint chip and pieces of plastic help police solve the mystery behind a hit-and-run accident that killed a high school athlete.
A killer is careless when using a murder weapon that is unique and easily traceable.
Police find clues in letters sent to frighten the victim.
Forensic science is used to determine if a woman's death was a botched robbery or intentional murder.
A daughter suspects something is wrong when everything from her fathers home is missing.
The case of a woman whose death was deemed an accident 16 years earlier is reopened due to a man claiming it was murder, but when the tipster is killed the police track down a possible serial killer
The disappearance of a college co-ed goes unsolved for 10 years, until new testing sheds a different light.
A clue no bigger than a thumbtack leads investigators to a trio of killers.
Criminals attempt to cover their tracks using fire. However, through the investigators' tenacity they find a small clue which leads them to the killers
Police investigate the murder of a man who died through ingesting cyanide. They find a clue in a mailing envelope which leads them to a dangerous killer
The case of a murdered policeman's wife is reopened when a newly formed cold case unit take another look at the evidence, and they find critical clues to the killers identity
A man calls the police to his house where his wife has fallen down the stairs, but the amount of bloodstains at the scene prompts investigators to treat the death as suspicious
The police struggle to believe a girl who claims she was abducted and sexually assaulted from her unemotional recounting of the tale - until fibres from her clothes prove the story
When a man is killed with a bomb investigators search for every piece of evidence until they find a clue that identifies the murderer
A Louisiana couple are attacked by armed thieves who force the woman to open a hidden safe - but investigators have little evidence as the criminals had their faces covered
The team are called to investigate a robbery which ended in homicide - but the detectives become suspicious when evidence shows the killer was breaking out of the house - not into it
Friend's of a missing woman receive a shock when her body is discovered, propelling investigators to use blood evidence to find the killer
Evidence from a mysterious car crash leads to truth that devastates three families.
A woman is found dead on her bedroom floor, the only clue is a bloodstained sheet. Breakthrough forensics enable police to identify the killer.
A man is the victim of a hit-and-run in a sailing accident, and when the police appeal for witnesses an unlikely person admitts to being a passenger on the killer's boat
The detectives rely on their tenacity to make a conviction when a medical examiner rules a death was accidental, and three years later the answer is revealed
A medical examiner rules that a death was accidental despite detectives who thought otherwise, then it takes three years, an exhumation and a second autopsy to determine who was right.
The body of a young girl is found on farmland in Delano, California, but a mailbox key is the only clue to her identity - prompting the police to search every building in the area
A triple murder in the town of Verona, Wisconsin, leads detectives into the shady world of high-rollers and off-shore gambling
Tiny fibres and an asthma inhaler lead investigators to the gunman responsible for shooting an off-duty police officer
Concrete from a junk car lot leads investigators to the most unlikely of suspects in solving the case of a young mother who disappears.
A victim of depression is found dead in what appears to be a straightforward case of suicide - until the discovery of a note hidden in a china cabinet leads investigators to her killer
A World War Two veteran is killed in his home, baffling the police - until a lucky break leads them to a shady character with a sweet tooth and a distinctive pair of boots
Investigators solve a double murder with the help of evidence obtained from a fingertip torn from a latex glove
A little girl's death baffles investigators, who travel halfway around the world before finally uncovering the answer in two unusual places - a shredded legal document and the signature of the child's mother
A known criminal's driver's license is found at the crime scene of a double murder, but collected DNA point investigators in another direction.
Investigators probe the case of a stockbroker who has failed to return home, and soon uncover proof that he has been murdered
A woman is killed in what appears to be a road accident, but footprints around the vehicle, and bloodstains both inside and outside it, lead investigators to suspect foul play
Police investigate the murder of a Kansas City lawyer in his own office, in the middle of the day. The killer left microscopic evidence which led directly to him
Forensic officers use a brand new technique to catch a killer who attempted to conceal his tracks by incinerating the evidence.
Forensic officers assist their police counterparts to recreate a bomb - which led to the death of a woman - to see if they can catch her killer
Forensic officers assist police to discover whether the deaths of three individuals on separate continents were caused by the same killer.
When a woman is found dead in her bathroom, forensic officers assist the police in determining whether she committed suicide or was unlawfully killed
The hunt for a serial arsonist in Washington, DC. The perpetrator was a careful operator, but there were clues in the ashes that led forensic scientists to the culprit
Detectives question the staff of a historic restaurant when the head chef is found dead.
With very little else to go on, investigators find that a show impression puts them on the right track to finding a killer in Lansing, Mich.
A man is murdered in his sleep, no fingerprints are left behind, but a shoe impression outside leads to the killer.
How three seemingly unrelated deaths proved to be the work of one murderer. The killer had been careful by using poison that had no taste or odour. However, investigators realised it would have a unique chemical signature and were able to demonstrate the link
How the latest scientific and forensic techniques helped solve the case of Robert Andrew, who was shot dead in his Oklahoma City garage in November 2001. It transpired his Sunday school teacher wife Brenda knew more about the attack that she was prepared to reveal
When a popular DJ is found murdered in a local garden, the cops race to find answers. With no other leads police turn to a blood spatter expert.
Evidence leads directly to a killer when a teenager goes missing and a month later her body is found.
Finding the killer of a woman who was found dead on a golf course in the Bahamas. The distinctive grass on the course provided enough evidence to lead the police to two suspects
Investigating the cases of two women from the same town who were murdered in the same way. Police fear a serial killer is on the loose - and find tiny clues which lead them to the same man
Police investigate a seemingly accidental drowning in an affluent suburb of Philadelphia. The case becomes focused on one person who had a motive for murder
Police investigate the murder of a college student who appeared to have known his killer. Hairs and microscopic cells help officers unravel a web of lies
Officers suspect an act of revenge when a bomb explodes in the family home of a witness who testified against two men convicted of shooting and killing a passenger in a moving car
Woman disappears from grocery store parking lot in Boulder, Colo.; investigators find extraordinary clues in a pair of bloody gloves, unique tire tracks, and ordinary grass and pine needles.
Investigating the murder of a millionaire, who flaunted his wealth and had little personal security. The evidence pointed toward a robbery, but detectives were not convinced
Investigating the rape and murder of a woman at the dry-cleaners she worked at. Police had eyewitnesses but when their descriptions were not clear, they turned to forensics
A brilliant young architect became ill and died just before she was to testify in a criminal trial. Find out how forensics used the evidence to crack this case.
A Navajo woman is found dead in a remote desert area in New Mexico. She had suffered blunt force trauma to the head from a sledgehammer- but who would do this?
The police investigate when they receive a call from a man, who claims his girlfriend shot and killed herself. The autopsy reveals that the wound could not have been self-inflicted
When police recovered the submerged car of missing man, they found no body; the investigation that followed uncovers a deadly obsession and the motive for murder.
The case of a missing Californian teenager, who was presumed to have run away. However, her body turned up in a ditch 20 miles away
Investigators determine how blood splatter evidence could prove that an obstetrician murdered his wife, despite his claims from him that he found her dead when he returned home
The light of day and DNA picture painted by molecular biologist reveals new clues about a nighttime traffic accident.
The decomposed body of a young woman is discovered in a canal. Police find a shoe print at the crime scene which will lead them to the most unlikely of killers.
A patrol officer is shocked by the amount of blood at a traffic accident and is shocked by the coroner's ruling until an anonymous phone call re-ignites the case.
How the police used evidence to track down the killer of a young boy who disappeared during a house fire and whose body was found 50 miles away from home
The wife of an Air Force officer was found dead in her bed, with a plastic laundry bag near her face. How did forensics piece together limited evidence?
The explosion of a pickup truck, which killed the driver and injured a passenger is investigated. But how did forensics help cops catch the person responsible?
The wife of a serviceman was brutally murdered in the Philippines in 1991, investigators must reassemble a 5-1/4 computer disk cut to pieces with pinking shears to find the murderer.
The case of a mother-of-two and army wife found dead in her bedroom. There were messages left near her body, and a gun in her hand. Her death was initially ruled a suicide, until investigators learned she had almost died in a house fire three years earlier and decided to take another look at the evidence to deduce whether murder was a possibility
An investigation into the disappearance of a woman in Key West, Florida, that yielded nothing but a pair of sandals which may have belonged to her. Then two important pieces of video surfaced, and police began to wonder if they should be searching for a missing person or a killer
When hunters find a skull in a Texas canyon, police find bits of clothing, a woman's shoe, some small bones and a strand of hair; once they discover her identity, it was time to find the killer.
Police instigated an intense search when the mother of two children went missing and, less than a day later, they found her body. How did forensics help detectives?
Examining evidence to determine how a fire broke out in the home of an elderly couple and whether their son was to blame, despite his pleas of innocence
How modern investigation techniques coupled with broken shards from a car headlight helped in the case of a hit-and-run death of a Michigan cyclist, leading officers to both the vehicle and its driver
A cold case from 1957, in which a man committed several crimes in one night - including murder. California police followed numerous leads but eventually the case turned cold. Almost 50 years later, with the help of advances in computer technology and handwriting analysis, investigators made a breakthrough
A case in which a house erupted in flames, killing one person and injuring another. The survivor blamed a kerosene heater; the evidence at the scene did not support her story, and she was charged with arson and murder. Later, a renowned fire inspector checked the evidence and discovered the real culprit
Police are puzzled when a man who brutally stabbed his wife and tried to drown her in their swimming pool appears to have no recollection of the attack
The kidnapping of a prominent banker's wife leads forensic experts to discover that extraordinary clues can be revealed by the examination of ordinary office equipment
The motive for the murder of an American tourist at a Mexican resort at first appeared to be robbery, until police found the evidence pointed to something much more sinister
The will of a wealthy tycoon reveals instructions regarding what to do if he was to die in violent circumstances, prompting suspicion he may have known he was in danger
A two-man shrimp boat sinks when a fast-moving, violent storm struck the Louisiana coast; a deckhand is considered a hero for trying to save the drowned captain, until his body is found.
Examining the case of a flight attendant's murder, and how meticulous analysis of biological evidence helped prove it was part of a series of killings
The application of modern technology to crime-fighting, revealing how fingerprinting and red carpet fibres near a corpse led police straight to a murderer
A look at how detectives used DNA samples to solve the mystery of three women who disappeared without a trace
How the latest forensic techniques helped detectives solve the case of a well-respected nurse who was killed in a car accident
How a discarded cigarette and a scrap of paper provided the forensic team with vital evidence to expose the identity of an arsonist in California
A Colorado hunter shot three times and killed was the victim of a crime, not an accident; police suspected two murder weapons, and two killers, but forensic evidence pointed them closer to home.
Police become suspicious of a man who reported his wife missing 15 years after doing the same thing with his first wife.
Experts use forensic technology to track down a killer after a tiny fibre is discovered on a victim's clothing
Fifteen years after a man disappears, using a metal detector, police find evidence which proves what had happened.
Police try to identify the killer of a 19-year-old girl who had multiple suspects with motives using evidence recovered from the suspect's trash.
A man is charged with the murder of a wrestling champion. Six years later, a forensic animator testifies on his behalf.
How forensic scientists used material from a dentist's office to uncover ballistics evidence which had been overlooked in an investigation 10 years earlier
At first investigators think a beautiful young woman's fatal fall from a cliff overlooking the Pacific Ocean was an accident, but forensic examination of photos arouses suspicion that foul play was involved.
When an English girl is found murdered nine months after going missing, forensic investigators piece together a portrait of her killer.
The team employ the skills of a forensic psychiatrist and the results of ballistics tests to solve a murder case
How scientists used forensic evidence to solve a murder case, taking clues from a missing piece of tape and tips from some concerned citizens
Investigators must find the cause of arsenic poisoning in a young woman.
How the forensic clues found on the clothes of three robbers led to their conviction for an apparently successful crime
Forensic scientists search the ashes of a blaze for clues to determine how the fire was started, and discover it may not have been ignited by a cigarette as was first thought
Police dogs track a killer's scent to a crime scene, leading them to believe the murderer could be one of the onlookers
A pawn ticket, a plant and a global positioning satellite help investigators unravel a murder case in which there's no body to be found.
An Alaskan trooper finds a woman's body beside a frozen road, but evidence is scant even after a suspected murder weapon is found.
A forensic document examiner, a slingshot and an unusual physics experiment help investigators find another killer
After a girl is found dead along a road, the obvious suspect stumps police with an alibi but tire tracks might provide a clue.
Arson investigators attempt to determine the cause of the 1987 fire at the Kings Cross Underground Station in London.
The derailment of the Sunset Limited was the deadliest train crash in US history.
An investigation into who was responsible for a deadly car accident.
A murdered teenager's parents accept responsibility for the killing, and claim they were acting in self-defence - but an FBI electronic surveillance device proves otherwise
A high school gym teacher gives his friend a ride home - and never returns; his wife and friend receive letters, saying he needed to start a new life; foul play is suspected but there is no body.
A teenage girl is killed, and her boyfriend confesses to the crime. When another man turns himself in as well, a further 40 years are needed to solve the case
A man is killed and another seriously injured in a drive-by shooting. The police have plenty of circumstantial evidence but nothing concrete : until they examine soil taken from the suspect's tyre treads
Part one of two. Police investigating a fatal shooting discover no forensic evidence at the dusty and unkempt scene of the crime, but a trawl of computers belonging to the victim's wife and her lover soon yields the information they need
Police investigating a brutal murder in a quiet neighbourhood fail to find any witnesses, but forensic evidence helps them apprehend their suspect in less than 12 hours
Police are mystified as to why a young man and his mother should be the targets of a pipe bomb - until the remnants of a postage label point them in the right direction
Investigators call in the experts when the wife of a wealthy car-crash victim makes a $7million insurance claim - and a chilling trail of fraud and deceit is soon uncovered
A discarded sweet wrapper and a number of tiny seeds are used by forensic scientists to provide evidence in a murder investigation
The bodies of two women are found in the aftermath of an apartment fire, and a small sample of blood helps police investigate their suspicions about the case
A retired police officer is found murdered in his bed and his wife claims his death was suicide. However, a bank surveillance tape calls her explanation into question
The murder of Kathleen Lipscomb, whose body was found on a deserted road outside San Antonio in 1986. Investigators believe a diary found years later could solve the case
An apparently healthy man dies mysteriously in his sleep, and toxicology tests reveal signs of foul play, causing police to suspect a 'suicide note' holds the key to the case
A serial killer announces his intention to kill one person from each sign of the zodiac, until handwriting analysis gives investigators the clues they need
A witness in a sexual assault case is murdered just before her appearance in court, leaving forensics to decide whether it was the defendant who killed her
A woman's disappearance in Alaska doesn't arouse suspicions of foul play, until she is discovered shot dead. An eyewitness's evidence reveals more
Two decades after a woman's murder, investigators glean incriminating evidence including an old hat and a tiny shard of steel
A woman is prescribed lithium to treat a mental disorder. When she dies, investigators must decide whether the side effects drove her to suicide
A homicide detective claims his dead wife accidentally shot herself in the head, but his suspicious colleagues turn to a forensic scientist and a ballistics expert to establish what really happened.
America's first DNA databank case succeeds in identifying the rapist and murderer of a TV news producer
A rare gun and a victim's beloved dog help investigators trying to solve a multi-year long murder case where most of the witnesses were admitted drug users.
A gay couple are murdered, leading investigators to a white supremacist organisation connected with hate crimes
Murder-suicide is suspected when police discover a family dead in their home until investigators start digging deeper.
A man accused of shooting his estranged wife maintains she committed suicide, and the investigators must establish which of the two versions best fits the evidence
A man is hailed as a hero after shooting an intruder found killing his wife, but forensic evidence spins the case in a surprising new direction.
Forensic examiners use a sound test, an electron microscope and a nightgown to explain how a union official was murdered in his bedroom without his wife in the next room hearing a thing
A man is found shot dead in his home, and investigators suspect his wife, who claims she was away on a camping trip with her lover at the time of her husband's death
An obscure print found at a crime scene.
A single footprint puts forensic investigators on the trail of a killer after two injured victims fail to identify their attacker
The forensics team are called in to investigate the murder of a pregnant woman, the circumstances of which bear a suspicious resemblance to scenes in a film recently shown on TV
When a nurse exhibits signs of flu, doctors are baffled : until it turns out she has been deliberately infected with HIV
A woman's 'accidental' drowning bears suspicious similarities to another death, casting doubt on the prime suspect's alibi
The story of a postman convicted of murder because of a bite mark on the victim. Ten years into his sentence, fresh evidence leads to another trial
A bite mark leads police to convict a postman during an investigation into a spate of robberies which resulted in a number of tourists being killed and injured
When the prime suspect in a woman's murder produces a solid alibi, a time-stamped video tape showing his activities on the day of the killing is analysed for authenticity
How a forensic handwriting expert found clues pointing to the murderer of a woman seen being bundled into a car
New forensic science and microscopic paint particles found in a vacuum cleaner bag help identify a girl's killer 24 years after the crime was committed.
A girl's death is linked to a spate of burglaries when CDs similar to those owned by the victim are found among a cache of stolen goods
A team of toxicologists investigate the death of a man whose girlfriend's suspicious behaviour led police to believe he was murdered
Authorities are able to apprehend a kidnapper because he allowed his victim to write a will on a telltale pad of paper.
The story of a woman who was sentenced to life for killing her mother. Her chances of winning a retrial appeared slim, until an expert witness proposed a different theory
A random serial sniper is plaguing Virginia and Maryland, with no profile of their victims.
When a man's body is found on a road near his family ranch, his wife tells police he went jogging, but the trail of evidence leads them back to his home
Police in St. Petersburg, Fla., use cell phone mapping, wiretapping and a host of forensic evidence to find a surgeon's killer.
Respiratory problems in a three-year-old boy and signs of Alzheimer's disease in his father leave doctors baffled, but an expert on toxic materials believes their home may reveal the cause
Police in St Louis reveal how a computer helped to capture a serial killer
How a composite drawing of a suspect provided a lead in the hunt for a serial rapist responsible for multiple attacks in Philadelphia and Colorado
How the latest forensic investigation techniques, such as behavioural profiling, hypnosis and sketch artistry, helped identify a serial arsonist in Seattle
Despite the serial number being scratched off a gun used in a shooting crime, forensic scientists demonstrate how they were able to make the digits reappear using the latest technology and help police trace the weapon's owner
The hunt for an elderly woman's murderer, which took 16 years after fingerprints and a trail of blood were found at the scene of the crime
The sudden death of a rich woman which baffled investigators, who could find no evidence of foul play, until the widower's ex-wife came forward to tell her story
The discovery of a charred tooth provides enough evidence to convict the prime suspect in a case involving a woman's disappearance
The abduction and murder of a nine-year-old girl from her home. Forensic investigators pieced together a trail which led to the arrest of the man who called the police
The brutal murder of an elderly couple, which initially produced no suspects. However, years later, a pawn shop owner made a chance discovery which led police to the killer
The disappearance of a Texan man's mail-order bride was initially seen as suspicious, but when police discovered his two previous wives died mysteriously, he was promptly arrested
How investigators managed to lift a handprint from the body of a murder victim using superglue fumes, and so gained enough evidence to catch her killer
The disappearance of a six-year-old girl. Investigators initially accepted a confession from her father, who failed the polygraph test, but 10 years later, the truth was discovered
Toxicologists discover the cause of a 62-year-old businessman's failing health where doctors were unable to diagnose the condition
How forensic teams solved a case in which the friends of a talented dancer came under suspicion from the girl's parents following her disappearance
The disappearance of a teenage girl who vanished while returning from a concert. Police found her abandoned truck with one tyre blown, but had to wait three years to find her body
A case involving an abandoned car in Philadelphia. Police found the driver's body the next day, and unusual marks on her corpse led investigators to her killer
How a Presbyterian minister's wife was discovered to have ingested large doses of different medications, leading investigators to suspect she was the victim of a murder plot
Forensic scientists use DNA testing to reveal the sinister truth about a respected Sunday school teacher in a murder investigation
A mother-to-be discovers her fiance may be to blame for the severity of the side-effects associated with her pregnancy
The murder of a couple during a suspected drug deal baffles police when the pair are found to be clean of any narcotics, until their pet dog gives investigators a new lead
The investigation into sexual assaults on four women in Indiana during the summer of 1996. A man was arrested and convicted for the crimes, but new evidence casts doubt on his guilt
The murderers who burned their victim's body to try to cover their crime, but failed to conceal 24 stab wounds found during forensic examinations
Phoenix police pursue a murderer-mutilator with little more to go on than the severed leg of a victim; anthropology, toxicology and DNA testing all come into play.
An 18-year-old girl's abduction from her home. Determined to prove the identity of her kidnapper, she deliberately left DNA at the crime scene
The study of insects provides experts with vital clues as to when a murder took place and whether the man accused is actually guilty
A case in which two witnesses reported seeing a truck drive over an apparently unconscious man. They retreated to the safety of a bar, but when police arrived, they found nothing
The disappearance of Madalyn Murray O'Hair, the founder of organisation American Atheists. Investigators have a number of suspects, until a mutilated body helps reveal the culprit
A bizarre case in which a woman was shot dead. Investigators initially suspected her husband of the crime, but forensic evidence gave the story a surreal twist
A mass food poisoning in Oregon in 1984, where investigators tracked the outbreak to a cult who intended to use germ warfare to overthrow the American government
How cat hair helped police identify a killer, after forensic investigators traced the feline fur discovered in a car along with the body of a woman
The manhunt launched as police tried to catch a serial rapist. When their original suspect was brought into custody, investigators lacked enough evidence to prove their case
When a teenage student is murdered and left in a deserted field, the authorities ask 51 of her friends to agree to DNA testing; shockingly, the evidence implicates her best friend Ken, yet he has an alibi for the night of the crime.
The murder of a young prostitute who was found dead in an Ohio waterway. Investigators faced an uphill battle to find her killer, as DNA evidence had washed away and a number of policemen featured on the woman's client list
Although a group of teenage thugs are suspected of attacking two boys on a fishing trip, there is no solid evidence; murky fishing hole, however, provides some answers.
The story of a woman who was raped and murdered in a pizza restaurant. A man was jailed after confessing to the crime, but, eight years later, a new confession reopened the case
The real-life detective series ventures into the music world and asks how an American hit single from 1966 -The Cheater, by Bob Kuban and the In-Men foreshadowed the demise of their lead singer, Walter Scott.
Series revealing how the latest forensic techniques help solve crimes. A mother and daughter disappear without any trace. The girl's body is then found on a roadside with still no sign of the mother's whereabouts. Forensic investigators have to determine whether she is a suspect in her daughter's murder or a victim.
A vehicle accident which leaves a young girl critically injured is deemed to be a hit-and-run; the girl's mother believes she can trace the driver and, using her own detective skills, goes on to gather evidence about the driver's identity.
The pregnant wife of a young, successful attorney is found dead from a shotgun wound to the head; detailed analysis suggests that it wasn't suicide.
A young woman goes missing without leaving many clues, but the advanced technology on offer makes it possible for cat hears and insects to help build an image of the abductor.
The similarities between an attack on a Maine State Trooper and the murder of a woman in New Jersey speed up the investigation into the killer's identity.
When a nine-year-old girl vanishes on her way to school, the entire community help with the search; detectives believe her mother may be involved, and a hidden fingerprint seals the case.
How the death of a female prison guard led to an investigation which revealed clues to a murder from 10 years earlier
A look at the case of a leading pornographer who shot his brother. Investigators study the recording of the emergency call to find out why
Despite a patient's claim that the cut to his hand had been caused by a dumpster, the doctor treating the injury recognized it as something else - and soon became the chief witness in a murder case.
A murder suspect's son who enrolled at law school and studied until he discovered the evidence needed to clear his mother's name
When the wife of a farmer disappears, there are no clues to her whereabouts and even when the farmer's former lover turns up with a tale of murder and cremation, there is no way to test her story.
The search for the killer of two teenagers in Texas shows a behavioral study on how most serial killers also have a history of abusing animals.
When a young doctor is accused of sedating and sexually assaulting two of his female patients; DNA tests show him to be innocent, but the women persist with their claims, and seven years later a private investigation leads to a surprising discovery.
Fundamentalist group is accused of robbing banks, authorities know they are dealing with experienced criminals and overwhelming evidence but the defense is very well funded.
A killer wants to outwit the police and keep the identity of his victim secret so he removes the teeth; however, lab tests on the skull reveal not just the horrific nature of the murder, but the identity of the victim too.
Cattle auctions, dud cheques and homeless drifters lead police to an elderly couple who are found to be responsible for a series of murders
How a tyre impression and a few threads led Florida police officers to identify a serial killer
A woman dies in a horseback-riding accident, but investigators find facts that make her husband a murder suspect.
How scientists uncovered a trail of deceit and medical trickery in their bid to learn the truth about a badly burned body
A professional photographer is linked to a missing model after vital evidence is uncovered by a park ranger
The disappearance of a six-year-old girl from a church service leads investigators to a taxi driver who was in the area at the time
How technology enables fingerprint evidence to be taken from fabrics such as curtains : a scientific advance which proved vital in identifying a woman's killer
Investigators race against time to preserve evidence of a criminal's footprints found in the snow
The investigation of a man's death in a doctor's office reveals an insurance fraud involving stolen bodies and false identities
How a woman charged with murdering her child in a house fire conducted her own investigations, bringing into doubt the government's conclusions
A Shakespearean play forces a girl to reveal the truth about the death of her father, who was thought to have died from a heart attack
How laser technology was used to trace the sender of an anonymous letter containing information about a murder and to discover the city, street and office number from where it was posted
How a girl's parents were jailed for her murder despite their claim that she was killed by the family dogs. Five years later, forensic scientists spot vital evidence
How forensic techniques helped find the body of a missing woman after a trail of blood petered out
A man becomes the prime suspect when his wife is missing presumed dead after a domestic dispute - but new evidence comes to light suggesting he may have been framed
The killer in a petrol station shooting is identified when cutting edge technology and forensic experts are brought together in the analysis of poor quality CCTV footage
A prosecutor uses a ground-breaking video reconstruction in court to demonstrate how a drink-driving accident occurred
Experts uncover the violent history and insatiable greed of a respected heart surgeon's wife as they investigate his alleged suicide
When a money launderer is found dead in the ocean, the only obvious clues to his identity are a Rolex watch and a tattoo; the anchor with which he is weighed down proves most helpful, providing clues in solving the crime.
A man who died from what appeared to be an accidental gunshot wound, a case that turned into a murder investigation - with his widow as prime suspect - when police learned her previous husband suffered a similar fate
When a young woman goes missing, the police investigation reveals that she led a double life - student by day, call girl by night; but when her body is discovered, even more strange truths are uncovered.
When the wife of a well-known doctor goes missing, the authorities believe a shady adoption ring may be involved, but the focus shifts when the doctor is seen with another woman who claims to be his wife.
When the police have no information about the identity of a dead girl's body, the victim of a stabbing provides a clue - she thinks she might have witnessed the murder.
An investigation into the high child mortality rate at a Texas hospital, which revealed that a particular nurse was on duty in almost all cases. The discovery of an unlikely murder weapon provided sufficient proof to build a case against her
Detectives think the marks on a victim's body implicate a man in his wife's murder, but medical detectives have an alternative theory about how the scars were caused
The application of modern technology to crime-fighting, revealing how unusual orange fibres found near a corpse provided the only clue to a girl's murder
Investigators attempt to prove their prime suspect raped and murdered a mother and her two daughters.
A pregnant woman who is attacked in her own home loses her memory. She later identifies her husband as the culprit - but 16 years on, new DNA evidence casts doubt on her story
Forensic scientists search the ashes of a blaze for clues to determine how the fire was started, and discover it may not have been ignited by a cigarette as was first thought
A decomposed body is found in a barrel, and a dilapidated address book may hold the answer.
A husband accused of killing his wife and her infant son is proven innocent when forensics discover a blonde hair at the crime scene
Forensic evidence from fibres provide clues to the murder of a dentist's wife committed two years previously - and disproves a confession to the killing
How computer studies and behavioural science combine to create the forensic technique of geographical profiling, which helped police catch a rapist
The police grow suspicious of a man when his wife drowns in the bath and an autopsy reveals a series of bruises on her body
How the FBI worked with Navajo medicine men to identify what had caused the deaths of children from their reservation
The disturbing tale of an American woman who experienced visions of her mother being killed by her father 30 years previously, although it was uncertain whether the events actually occurred
A baby's death prompts a police investigation when she is discovered to have died from E-coli poisoning and the trail of bacteria is traced to contaminated apple juice
A housewife is found dead at the foot of a flight of stairs, but the police initially rule out foul play - until her husband claims the life insurance and takes up with a new woman
Using forensic techniques, investigators try to uncover the murder of two boys who were killed in a similar way three months apart
How police became suspicious when they discovered traces of thallium in a deceased man's body, causing them to re-examine his 'accidental' death
The case of a young girl's abduction, solved by police when fibres left at the scene were matched with those recovered from the car of their prime suspect
A man confesses to his wife's bizarre murder, but the police are unconvinced. It needs the intervention of a dentist and a forensic geologist to find the real killer
How faint blood splatters found on a wall during the search for a missing man alerted police to a love triangle gone tragically wrong
An unusual murder case in which a woman was injured and her two children were killed, though the assailant left little evidence of his presence
How police forensic teams used blood found at a murder scene to capture the killer of an 18-year-old woman, who was killed by her boyfriend when she refused his sexual demands
An investigation into the cause of a baby's sleep disorder, which mysteriously stopped when it was taken away from its mother
How police solved the case of a missing nine-year-old when they recovered a fragment of paint from a convicted child molester's car
How DNA evidence finally exonerated a prisoner after he had been wrongly sentenced to three life sentences for rape and sodomy by a Virginia court in 1984
How a partial thumb print and single wig fibre led to detectives discovering what happened to a 23-year-old woman who disappeared without a trace, revealing a tale of murder, madness and mistaken identity
Detectives learn that a genetic disorder caused the deaths of a woman's children, resulting in an overturned conviction.
A car accident which killed a young man develops into a sinister case when detectives believe it was murder. The results of the investigation devastate three families
The police investigation into the kidnap of Robert and Paula Sims' baby daughter, which uncovered a similar incident that had taken place three years previously
A bomber who appeared to be targeting members of the legal profession was tracked down after the police asked the FBI to draw up a psychological profile of the offender
A Californian doctor claims to have proof that the human form of BSE can be contracted through eating infected beef
Insight into how forensic work revealed that human remains found on a campsite belonged to a pregnant woman who had been missing for five years, ultimately leading to the arrest and conviction of the victim's husband : a Scout leader
A series of murders near Sacramento, Calif., where prostitutes were gagged and molested, their clothes cut in random patterns and their hair cut off.
The puzzling deaths of two dinner guests in Nebraska in 1978 which confounded police until they realised both victims had consumed lemonade laced with poison - the discovery of which led them to an embittered killer
Discovering the largest water-borne outbreak of gastrointestinal illness in the US, when adverse weather conditions contaminated Lake Michigan with manure from Wisconsin's dairy herds
How police used scientific techniques to detect where a boy was murdered, enabling them to link the case to a man arrested for another vicious killing
A man kills two people with bombs in an effort to get investors off his back and is sentenced to life with no chance of parole.
A primary school teacher claims a colleague has resorted to a smear campaign to oust her from her position. The facts seem to bear out her allegations : but will DNA tests back up her story or tell an entirely different tale?
How a link was established between two poisoning cases, when traces of a chemical used to kill algae in fish tanks were discovered by investigators in both of the victims
The use of forensic evidence to solve crimes, focusing on the discovery of a woman's charred remains which led police to uncover a tale of drugs, greed and murder
How investigators traced a series of outbreaks of bleeding lungs in infants to a deadly black fungus which was growing in water-damaged houses in a Cleveland neighbourhood
A farmer fears someone is conducting a vendetta against him and his wife, but investigations reveal all is not as it seems
A woman's mysterious flu-like symptoms are diagnosed as something far more sinister, leading investigators to take an interest in one of her neighbours' passion for chemistry
How a man who killed his wife and set fire to her body on his boat was convicted of her murder, when incriminating blood samples were taken from the family home
How experts investigated a thick fog's regular appearance over an American interstate - which led to a spate of fatal car crashes over a 15-year period - and found the trail seemed to end at the doors of a local paper plant
The work of forensic teams in proving a missing couple's son was responsible for their disappearance, leading to the recovery of the body and the killer's conviction
The discovery of carpet fibres linked ten unsolved murders in Florida in 1984, but the police still couldn't crack the case until a 17-year-old girl managed to escape from her captor and provide the final clue to catch the killer
Investigation into the effects of badly prepared food and the spread of the potentially fatal E-coli virus, including the story of an 11-year-old who nearly died
How a man who murdered his family was traced after 18 years on the run, using the latest technology to create an artificially-aged sculptured model of his likeness
Scientists in South Dakota discover many residents have high levels of animal thyroid hormones in their systems - apart from one boy who doesn't eat meat
How the work of entomologist David Faulkner helped track down the killer of Sandra Cwik, whose body was found in 1988, decomposing and riddled with maggots
Investigations into whether buried poisons, electrical substations and other modern environmental agents could be responsible for outbreaks of cancer and leukaemia across America
A doctor is found dead in a pool of his own blood and the prime suspect is a local handyman who is caught with the victim's credit cards, but his claims incriminate the victim's wife
In 1976, 180 war veterans in Philadelphia were hospitalized with pneumonia-like symptoms and 29 died. The disease resurfaces every few years.
Advances in DNA profiling lead to the conviction of a serial rapist in Virginia, and pave the way for the man originally convicted of the crimes to be released
A molecular scientist in Arizona investigates seed pods found in a murder suspect's car - and finds they came from a tree near the crime scene
Pioneering genetic fingerprinting techniques are used to hunt down a man who committed murders in 1983 and 1986
Police find blood splatters, through chemical testing, when a man reports his wife missing.
A 15-year-old boy is shot in the head in the lobby of a gun club, and ballistics, laser technology and forensic animation are used to solve the case
The mysterious disappearance of a woman who discovered her husband had been having an affair. Did she return to her native Denmark, or is there a more gruesome explanation?
A speck of bicycle paint and a speck of nickel tie a suspect to the murder of a 9-year-old.
A shoe impression leads investigators on the right track to finding a killer.
An arsonist is on the loose in Washington, D.C.
Detectives question the staff of a historic restaurant when the head chef is found dead.
When a grounded teenager disappears from her California home, police suspect that she is a runaway until her body is found several days later.
Police find photographs in a big trash bin leading them to a model's murderer; computer animation helps investigators determine whether a shooting was premeditated.
When a young woman disappears, police think an abusive ex-boyfriend is to blame.
A woman's murder goes unsolved for almost two years until a tiny drop of saliva revives the police investigation.
An abandoned car is found with the engine running and the driver's door open.
Alarmed by the severity of her morning sickness, a pregnant woman suspects foul play; disease detectives investigate a suspicious case of mass food-poisoning in Oregon.
A song called 'The Cheater' foreshadows a singer's demise; investigators analyze blood to determine if a gunshot wound was self-inflicted.
An arson investigator's depressed wife burns to death.
War criminals who moved to the United States are captured many years later thanks to forensic technology.
An accused rapist has blood taken from his arm on several occasions, but the results are misleading; after more than a decade, geographical profiling enables police to catch a rapist.
A stalker who was able to steal his victim's alarm code and personal photos is caught out by his threatening letters
New scientific testing sheds light on a ten-year-old case involving a missing college student
A daughter uncovers a mystery surrounding her father when she realises something is wrong with him, even though she lives more than a 1,000 miles away
How the latest scientific and forensic techniques can help solve puzzling crimes