Forensic Files

A woman heads home after church, but never makes it there alive, triggering a homicide investigation.

When detectives find a mismatched button in relation to a woman's death, they know they can follow the clue back to the killer.

Volunteers and police spend weeks searching for a missing girl. A psychic later leads them to a field where the body was found.

Texas police hunt frantically for a brutal rapist. No one knows where he'll strike next, but given the increasingly violent nature of his crimes, he must be found soon.

When a man perishes in a fire while working in his garage, his death is initially ruled an accident until a forensic odontologist changes the direction of the case.

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.

Insects and a single strand of hair uncover an additional suspect in the killing of a young mother and her baby in Lehigh Valley, Pa.

A new life-insurance policy sparks suspicions of murder when a Nova Scotia schoolteacher's body is found at the bottom of her basement stairs.

A bullet-riddled car, a missing driver, and no witnesses, an ambush or a random attack; the clue was something so tiny, it was measured in millionths of a meter.

When friends see a woman in the back of a car flailing her arms and screaming, they assume she is having fun, but when they later come upon a jacket and a pool of blood, they realize they witnessed an abduction in progress.

A cunning serial rapist who leaves no decisive evidence forces investigators to rely on geographical profiling in their search for an identity; DNA from a cigarette butt may provide the final piece of evidence needed to catch the suspect.

When a young woman goes missing on the way to the train station, investigators use a strand of hair and a bloody pillowcase to find a suspect.

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.

Police exhume the body of Karla Brown, murdered in her home in 1978, to study bite wounds, which eventually lead to the killer.

A 2-year-old boy's brain seizures and breathing problems baffle doctors until they learn the mother exhibits signs of Munchausen syndrome by proxy, a rare condition that led her to physically abuse her son and contributed to her daughter's death.

A husband confesses to his wife's murder, only to be found not guilty a year later when a phone tip and forensic evidence point to another.

Florida authorities rely on DNA evidence to try to nail the killer of a woman who was abducted from her late-night job at a convenience store, raped and strangled.

A beverage company pleads guilty to violating federal safety laws when a baby dies from E. coli after drinking apple juice.

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.

Investigators reopen a case from 1984 involving the rape of a young Virginia woman when DNA testing refutes her identification of the rapist and calls everything into question, leading to the accused person's exoneration.

Investigators use obscure evidence to find the person responsible for killing justice officials with mail bombs in the South.

Detectives learn that a genetic disorder caused the deaths of a woman's children, resulting in an overturned conviction.

Teenager is found half-naked with her throat slit; a single foreign hair found on her thumb may finger the killer.

New evidence including fibers and weather patterns point to a different killer in the 1986 case of a Pennsylvania dentist's murdered wife.

When a businessman is murdered, motives and suspects are plentiful. Was it simply a disgruntled employee or client? Or do some racy photos hold the clue to the crime?

A week after a couple disappears from the beach, police get a mysterious lead from a robbery.

Forensic investigators try to stop a killer who is apparently responsible for two slayings in a community in South Carolina.

Police are able to create a composite sketch of a man burnt beyond recognition. But tracking the killer is more challenging.

A family break turns into a nightmare when the wife is found face-down in a lake; with no idea whether it was murder, an accident or suicide, police turn to a new forensic technique.

A masked gunman kills two members of a family and wounds two others after they interrupt his burglary at their upscale suburban home.

An attack on a couple's home leaves the husband dead, the wife gravely injured and their son as a prime suspect; hundreds of miles away, a DNA sample may lead to the killer.

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.

Tara Munsey went missing after a work shift at a Virginia restaurant and it is unknown if she ran away or if she was the victim of foul play.

A man is found dead of an apparent suicide. But soon after, information emerges which reveals a much more menacing scenario.

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.

Forensic scientists provide authorities with evidence that a death deemed accidental 20 years ago was actually murder.

By cutting a strand of a murdered man's hair into sections, forensics reveal a record of his last six months alive, and find he was frequently ingesting huge amounts of arsenic.

A woman who survived a deadly childhood fire sends police a letter charging that her father killed her mother 30 years ago.

Evidence that includes threatening emails, a missing person and an abandoned truck lead police to a woman's suspected killer, but they don't have the victim's body.

A woman has an accidental fall down a flight of stairs and appears to have hit her head, but the lack of blood splatter and misplaced shoes lead police to believe the fall was staged.

Detectives search for the bombers of two churches in Illinois, hoping that the materials used in the remnants of the handmade bombs will offer the clues to catch the culprits.

Lack of evidence compels investigators to look beyond the obvious when a woman is beaten to death at her in-laws house.

The assistant manager of the restaurant had been stabbed to death; police knew why he'd been killed: $8,000 was missing from the safe. As to who was responsible, his family and friends couldn't even imagine who'd want to hurt him.

In Lorton, Va., police attempt to determine who abducted 5-year-old Melissa Brannen after she disappears from a Christmas party, but cannot be certain until they match hair from a rabbit-fur jacket Brannen wore that day.

A mother claims that an intruder murdered her two sons, but lacking a motive, police use blood-spatter analysis and behavioral profiling to reconstruct a different scenario.

In a series of murders near Sacramento, Calif., a killer gags and molests prostitutes, cuts their clothes in random patterns and cuts off their hair; microscopic evidence helps solve the case.

Fifteen years later, DNA technology leads to justice for a murdered woman and her savagely beaten 4-year-old daughter.

A young college student is found dead in her apartment and the autopsy rules the death a homicide by an unknown male suspect.

There was no apparent reason for the young, healthy college student to be dead; but when the medical examiner found the tiniest of clues during the autopsy, investigators were able to unravel the mystery of betrayal and revenge.

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.

Two years after an 18-year-old's murder in Albion, Mich., a tiny drop of blood and burned bones lead police to her killers.

A killer leaves equally incriminating evidence at the scene when he meticulously wipes away his fingerprint and shoe impressions.

A quiet waitress who hasn't been to work in two days vanishes without a trace; police suspect a date gone wrong.

After years of suffering domestic abuse, a young woman is found murdered in her bathtub; among numerous clues, a hamburger bun proves the most incriminating.

A woman is stabbed a hundred times and her body positioned in a suggestive manner. This could be a hate crime against women.

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 body is found stuffed into a suitcase forcing the police to search though the landfill for another missing victim.

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 don't have a basis for comparison to match shoe impressions, blood drops and DNA evidence from a murder scene.

Two women who lived in the same apartment complex were brutally murdered; the similarities of the crime scenes led police to believe they were dealing with a serial killer who hated women, and they had to find him before he struck again.

A woman goes missing for a month with the only clues being a set of keys, a fingerprint and a code.

While at a real estate conference in St. Louis, a man finds his wife drowned in the bathtub in their hotel room.

When DNA proves that a man who practically admits to a brutal attack is innocent, police wonder why he is willing to take the blame.

Four young adults are murdered in an affluent Texas neighborhood, with little evidence but two people walking by dressed in black.

A speck of bicycle paint and a speck of nickel left over from a collision with a twice-convicted child molester's car provide critical clues in the murder of a 9-year-old.

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 routine missing persons report leads Texas police to discover a deadly love triangle; evidence found in a suspect's home matches the murder scene and leads to the indictment of the victim's girlfriend and her lover.

After the discovery of a skull in the forest near a boy scout camp, police use facial reconstruction to identify the body.

A church member gets gunned down after leaving choir practice; although witnesses see little and not much evidence exists, investigators learn that she had been having affairs for years.

When a Pennsylvania man checks into a hospital for leg pain and later dies of thallium poisoning, police investigate his wife and find her in the process of collecting an insurance payment for her previous husband's death.

A community is shocked when police discover a woman raped and murdered in broad daylight on a public trail.

Detectives think they've solved a murder when they find the weapon and victim's blood in a man's flat, but the evidence may have been planted.

A 1995 fire razes the mansion of a Kansas doctor, killing two of her three children; disturbing accounts from an ex-husband lead investigators to believe the doctor set the blaze herself.

When evidence shows a woman's rape and murder, police must find the killer as well as the victim.

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.

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; putting it on five billboards helps them find the killer.

After more than 20 people on a Native American reservation die suddenly from a flu-like disease, Navajo medicine men provide a clue that leads to a most unlikely killer.

Autopsies reveal that a string of unexplained deaths in Omaha resulted from poison-induced liver disintegration.

Investigators face a growing list of suspects after a beautiful flight attendant is brutally murdered in her own home.

A decomposed body is found in a barrel, and a dilapidated address book may hold the answer, but investigators must find a way to read the pages because the passage of 30 years has turned them blank.

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; seven years later, a private investigation leads to a surprising discovery.

When a 9-year-old girl vanishes on her way to school, the entire community helps with the search; detectives believe her mother may be involved, and a hidden fingerprint seals the case.

When a woman exhibits strange flu-like symptoms before dying, investigators discover someone added thallium to her soda; detectives initially suspect her husband, but the case takes a sinister turn.

Investigators look into the shooting death of Russ Stager, a popular gym teacher, and discover that his death was not an accident; a message the victim recorded before his death reveals a story of greed.

When a policeman's home burns to the ground, he later arrests a man who confesses to arson, but the confession seems dubious.

A young woman goes missing without leaving many clues, but the advanced technology on offer makes it possible for cat hairs and insects to help build an image of the abductor.

The FBI profiles a suspect in the kidnapping and murder of a 6-year-old girl during an evening church service; a witness leads authorities to the likely killer, but then becomes a victim herself.

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.

Heavy rains and snow run-off carry manure into Milwaukee's water supply in 1993, leading to an epidemic of gastrointestinal illness affecting 400,000 people.

One year after her father's death, a teen's role in a high school production of ``Hamlet`` causes her to reveal the chilling truth behind her family's tragedy.

The investigation of a murder case in New Jersey is stalled until a similar attack occurs on a state trooper in Maine.

A killer assaults a young mother in her home, but despite meticulous washing of the crime scene, a single hair remains to lead authorities to the culprit.

When dozens of infants develop serious breathing problems in the Cleveland area, doctors and investigators search high and low for the cause.

A mother puts her hope in the internet and an independent investigation to clear her name after authorities charge her with murdering her 17-month-old son in a fire considered to be intentionally set.

When a doctor's wife disappears, investigators use concrete from the doctor's yard and the recollections of a child to determine what happened.

A forensic scientist uses his skills to preserve a footprint left in snow to help authorities nab two men suspected of robbing an Ontario couple and shooting the husband in the head.

Police discover a mask near the crime scene and hope that it leads to the killer of a funeral director.

San Diego police investigate the murder of a missing person whose hands turn up in a dumpster; an anonymous letter, containing details only the killer would know, offers clues to solving the case.

When a woman dies in a horseback riding accident, police uncover a web of lies in her husband's background after his suspicious behavior prompts a closer look.

The 1992 hit-and-run death of 6-year-old Nicole Rae Walker leads to a groundbreaking trial as experts submit a video reconstruction of the incident, implicating a drunk driver and demonstrating the viability of video testimony.

Experts attempt to discover the source of heavy fog on Highway I-75 in Tennessee, which caused a 99-car accident and 12 deaths.

Missouri police are thrust into a bizarre web of homeless drifters and cattle auctions when they are called to retrieve a dead body.

Police charge Alan ''The Zenith Man'' Ridley with murdering his wife, Virginia, but following an autopsy, medical detectives believe he may not have killed his wife after all.

When the decomposed body of a young girl is discovered, police have no clues to her identity, but days earlier, a stabbing victim told them she thought she might have witnessed a murder.

In 1976, 182 war veterans in Philadelphia become hospitalized with pneumonia-like symptoms and 29 die; the disease resurfaces every few years.

When a 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.

When 4-year-old April Renee Tucker is found dead in her backyard, her parents tell the police that neighborhood dogs attacked and killed her, but the injuries on her body don't match their account of what happened.

A young girl is found dead, the victim of an apparent sex killer; there are few clues to the killer's identity, but authorities are intrigued by unusual orange fibers embedded in clothing found near the victim.

A woman identifies her husband as her attacker, but questions arise 16 years later regarding her recollections.

A man arrested for the sexual assault and attempted murder of a boy in a European country becomes linked to a murder in Zurich, Switzerland, through analysis of microorganisms.

A tiny clue inside a suspect's watchband and a popular television show help solve the case of a woman's disappearance.

One year after Maine resident Pearl A. Bruns' disappearance, forensic technology helps to find her body and determine who was responsible for her death.

When a man dies unexpectedly in the office of a noted California doctor, police begin what they think will be a routine investigation, but discoveries of false identities and insurance fraud raise questions about the doctor's role.

Blood spatter analysis and an investigation lead police to the truth when a pregnant woman is found dead in her home.

With children dying at an alarming rate at a Texas hospital, authorities narrow down their probe to one nurse, but the murder weapon remains elusive.

When 15 year-old Marlene Miller was murdered, it would take 24 years and several retrials before forensic scientists discovered the evidence to bring her killer to justice.

When prison guard Donna Payant's body is discovered at a landfill, a medical examiner uses a ``signature`` clue to link her death to a murder the same examiner investigated 10 years earlier.

Photographs found in a dumpster lead to the killer of Los Angeles model Linda Sobek; the man claims he did not intentionally kill her despite evidence to the contrary.

Police use DNA profiles of seed pods from a truck to catch a killer.

A man kills two people with bombs in an effort to get investors off his back, but authorities catch onto him and he becomes sentenced to life with no chance of parole.

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.

An 11-year-old boy comes down with a fever and diarrhea after eating an undercooked burger; when his condition worsens, his mother drives him to a hospital and doctors discover E. coli destroying his body.

When a farmer's wife disappears, the tests of a plant pathologist and a dendrochronologist lead to a surprising revelation.

Evidence reveals a teacher who complained of being stalked and harassed by another teacher was scamming police.

The apparent suicide of Dr. Darryl Sutorius, a respected heart surgeon, is questioned when an investigation reveals his new wife's violent history.

When a woman goes missing from her home, police focus on her husband when an airline luggage tag and luminol point to an affair and murder; footage from a TV crew and Coast Guard photographs lead investigators to the suspect's missing boat.

The pornography empire cultivated by brothers Artie and Jim Mitchell crumbles when one turns up dead and his brother confesses to shooting him; investigators question whether the shooting was premeditated.

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.

Fingerprints taken from a piece of cloth help solve the rape and murder of a 22-year-old woman in Henrico County, Va.

A well-liked bank vice president collapses and dies after taking pain pills laced with cyanide; the search for a motive reveals a callous suspect who had murdered once before.

Police believe they have a serial rapist and murderer, but DNA testing and research leads to another arrest and conviction.

Handwriting and simple doodles complicate a car-bomb case and an alleged self-defense shooting in a peaceful British farming village as police uncover a husband's plot to kill his wife for insurance money.

Florida police search for a serial rapist and murderer who left small red fibers on each of his 10 victims.

When an English couple go missing, police suspect their son killed them and must rely on mud and blood samples found in the couple's two cars to find their bodies.

The investigation into the disappearance of flight attendant Helle Crafts leads to the murder conviction of her pilot husband.

Scientists and detectives use DNA to solve a string of rapes and murders.

In 1971, John List disappears after murdering his mother, wife and three children; he eludes the law for years until an age-scaled sculpture of the suspect and a true-crime TV program helps lead to his arrest in 1989.

After a wealthy Southern physician gets murdered with a baseball bat, his wife and a handyman become convicted of the crime.

A money launderer is found dead in the ocean and 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 in solving the crime.

A serial killer in Tampa, Fla., taunts police by strangling prostitutes and leaving their bodies in plain sight, but tire marks and fibers lead to the culprit.

Romanian archbishop Valerian D. Trifa, living in the U.S., is accused of being a Nazi war criminal, and forensic experts find evidence on an incriminating, 40-year-old postcard.

Specialists including a NASA vendor help police reconstruct a damaged surveillance video to catch the murderer of convenience store employee Wanda Mason in Lansing, Mich.

A son who is convinced of his mother's innocence in the death of his father enrolls in law school to try and clear her name.

A murder mystery theater performance in Easton, Md., turns into a real-life mystery when a body is found after the performance ends.

A garbage bag leads police to a child's killer.

A handsome young doctor's fiancee experiences severe illness after revealing that she is pregnant, and launches her own investigation to determine if the doctor is somehow responsible.

Two people witness a truck driving over an unconscious man and flee into a nearby bar, but when the police turn up, the truck, the man and the witnesses are gone.

A trash collector finds a severed human leg in a trash bin but police cannot use conventional methods of victim identification; investigators turn to toxicology and DNA tests to find the murder-mutilator.

A woman is found dead from a gunshot wound and police suspect her husband, however, forensic teams prove what really happened and the truth is stranger than fiction.

A girl who is abducted and then released soon afterwards uses her knowledge of forensics to lead police to the kidnapper.

The disappearance of a mail-order bride proves suspicious when detectives learn that two of the Texas husband's previous wives had died in mysterious circumstances.

A man tells police he shot an intruder who murdered his wife; forensic evidence leads police to re-examine the man's motives.

An obscure print found at a crime scene.

Using an anonymous letter and geographical profiling, investigators close in on a serial rapist, and a cleverly obtained DNA sample confirms their suspicions.

A homicide detective claims his wife accidentally shot herself in the head, but the evidence indicates otherwise.

A death in Pennsylvania is strikingly similar to one in North Carolina.

Investigators weigh several theories while probing the death of a retired police officer, including a botched robbery and suicide.

A look into the 1984 Oregon food poisonings, where detectives track down the outbreak to a cult which aims to use germ warfare to take down the government.

A chip of stainless steel brings a killer to justice 20 years after a woman's body is found in a ravine.

A search in Virginia's DNA databank reveals the identity of a news producer's murderer.

When a young boy has serious respiratory problems and his father shows signs of early Alzheimer's disease, a chance encounter with a stranger kicks off an investigation into the cause.

A couple's murder leads investigators into the world of white supremacists and a string of hate crimes.

The murder of a young Seattle couple puzzles investigators until the victims' dog, Chief, leads police to the killer.

A family suspects their teenage daughter's new friends were involved in her disappearance.

Experts debate whether an apparent heart attack victim died from natural causes or alleged poisoning by his girlfriend.

time of death becomes pivotal when a pregnant woman is found murdered in her air-conditioned bedroom.

When a 6-year-old disappears, her father becomes the prime suspect; he fails a polygraph test and even confesses, but 10 years later, the investigation gets turned on its head.

A jeweler's search through old sales records helps police find likely suspects in the murder of elderly couple Edward Kowalzck and Gertrude Thompson.

Investigating the worst arson spree in U.S. history -- a rash of more than 75 fires near Seattle.

Two different men report the murder of a single mother and when the case's other anomalies stall the police, a candy wrapper and seeds help expose the killer.

Eight years after a man confessed to the murder of a young woman, another man claims that he committed the crime, and investigators must use forensic evidence to determine the true killer.

A suspicious neighbor gives police a break in a cold case.

Police find fragments of deleted computer files leading them to suspect a woman's suicide is really murder.

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.

Police in St. Petersburg, Fla., use cell phone mapping, wiretapping and a host of forensic evidence to find a surgeon's killer.

Authorities are able to apprehend a kidnapper because he allowed his victim to write a will on a telltale pad of paper.

When a healthy young man dies mysteriously in his sleep, toxicology tests reveal that it may have been foul play. Could a `suicide note' hold the key to solving the case.

A woman is killed weeks before testifying against the man who sexually assaulted her.

Technology able to analyze human bite-marks yields information on a woman's death.

A diner in a small town, an endocrinologist and a forensic botanist help destroy a prime suspect's alibi.

Investigators build a makeshift tent around a woman's body and use super glue fumes to lift the killer's palm print from the victim's skin.

A coroner finds telltale clues on the badly burned body of a murder victim, sending police in pursuit of a couple of killers.

A woman wins her release after being imprisoned for allegedly killing her mother in a car fire.

When fire fighters find a family dead inside their home, it appears to be a murder-suicide; clues at the scene lead investigators to believe otherwise.

In a groundbreaking case using animal DNA, investigators use forensic testing on a cat to help them solve the case of a woman who vanished from her home on Prince Edward Island.

Although a group of teenage thugs are suspected of attacking two boys on a fishing trip, there is no solid evidence until a murky fishing hole provides some answers.

Insect evidence helps to solve the mystery of a woman found dead near a river bank.

Forensic scientists try to find a way to ''lift'' the serial number from a shotgun that's their only clue in a case.

A woman is killed two days before she was scheduled to testify against a man accused of assaulting her and the prime suspect has an alibi.

Forensic science and deductive reasoning determine what happened to a mother and daughter while they were on a shopping spree.

When a nurse starts experiencing a variety of flu-like symptoms, she discovers that she is HIV-positive; she learns that her infection was not accidental.

Detectives use a forged signature to find a woman's abductor.

New York police hunt the Zodiac killer after a series of deadly attacks.

A seemingly model citizen turns out to be a serial killer.

Discovering that an assault suspect is left-handed is crucial to a police investigation dating back 16 years.

The bodies of two young women are found in the ashes of an apartment fire.

An 11-year-old girl is sexually assaulted and shot twice at close range.

An abandoned, still-running car leads investigators to a body with unusual marks and a DNA trail that lead to the killer.

In a small South Carolina town in 1991, 17-year-old Crystal Faye Todd, a popular high school student, is raped, murdered and dumped in a deserted field; with few leads, authorities test the DNA of several friends, and one match shocks everyone.

Officials probe the death of a woman investigating the possible side effects of the drug she was prescribed for bipolar disorder.

Exploring how an American hit single from 1966 -- ``The Cheater`` by Bob Kuban and the In-Men -- foreshadowed the demise of the group's lead singer, Walter Scott.

When a 62-year-old man opens a car restoration business and becomes seriously ill, his doctors cannot find the cause, but forensics can; identification of a highly toxic metal in the victim's blood leads to his poisoner.

When a 12-year-old was found dead in her home, police were left clueless until a string of burglaries months later. A trail of stolen goods may help solve a murder.

The sensitive nose of a forensic examiner sniffs out murder.

An investigation into the disappearance of a young woman uncovers a tooth that helps police solve a crime without a body.

A bite mark is all the evidence needed to convict a suspect who was robbing tourists in Florida.

A mother is determined to discover what happened when her daughter is injured in a hit-and-run accident.

A child's memory, a diary and a forensic psychologist help investigators solve a young woman's murder.

Neighbors do not hear the gunshots when a union official is killed in his home.

When young prostitute's body turns up in an Ohio waterway, authorities have one tiny clue which could point to her killer, but face huge challenges due to her policemen clients and DNA evidence being washed away.

A man is arrested and convicted for a series of sexual assaults in Indiana; years later, forensic developments reveal new facts about the case.

A police officer claims his estranged wife's shooting death was a suicide, but investigators think it was a murder.

After American Atheists founder Madalyn Murray O'Hair disappears, the discovery of a mutilated body helps police catch the culprit.

Computers aid the police and FBI in solving a string of crimes.

A quiet residential community, shattered by the murder of a neighbor. See how modern techniques helped investigators catch the culprit in less than 12 hours.

When a pipe bomb rips through a rural home, killing a young man and seriously injuring his mother, detectives hope that the remnants of a mailing label will lead them to a killer.

After a Connecticut man's body is found in a burning rental car on a Mexican highway, an insurance company suspects a scam.

A man is found dead in his Michigan auto-salvage shop.

A young girl beaten after watching her grandmother killed, identifies the wrong person; years later she tries to change her statement.

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 husband and wife get shot and their 16-year-old daughter manages to escape, but investigators suspect she may be involved in the murder.

A canine behaviorist uses the family dogs, who are the only witnesses, to find the murderer of their owner.

After 10 years, a witness decides to do the right thing about the rape and murder of a young hairdresser.

A convicted arsonist claims his innocence and with no lawyer, no money and only a fifth-grade education, sets out to prove it.

In 1984 police failed to convict the murderer of a college student; new technology may finally help the police to catch her killer.

Police investigate the possibility of a hate crime when two women go missing and are later found murdered.

Investigators see through a killer trying to cover his tracks by staging the crime scene to learn what really happened.

Police investigate a young woman found murdered two weeks after reporting a road rage incident; evidence leads not to the aggressive driver, but one of their own.

When a human skeleton is found on marshland and determined to be at least 18 months old, a computer consultant gives her a face and name.

Suicide notes and a pistol in hand lead police to suspect that a mother of two young children appeared to had killed herself, but when investigators learned of a house fire she was in three years earlier, they reinvestigate.

A 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 Russian immigrant is found dead and a strange phone call to his office is the only lead investigators have.

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.

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.

A killer places all the incriminating evidence to the murder in a plastic bag, hoping it will float down the river.

Physical evidence intially condemns a prime suspect to a double homicide, but DNA from a discarded spoon points to another.

After a tycoon's wife is found dead in her SUV submerged in a half-frozen creek, police begin to suspect it wasn't an accident.

A wife is missing in Key West; investigators wonder if they should be searching for a missing person or a killer.

The violent death of an Air Force officer's wife outside a Philippines air base is examined, amid accusations of a love triangle involving the murdered woman's husband; investigators use groundbreaking computer forensics to make their case.

When three students are brutally murdered close to campus, investigators must determine what the women had in common before their serial killer strikes again.

Detectives are suspicious after a woman is killed in a hunting accident, but it takes more than twenty years before a trace evidence analyst is able to match fibers on a soiled blanket to the killer.

A young girl falls ill and dies; forensic investigators search for evidence halfway around the world to shed light on the tragic death.

Pieces of plastic the size of sand hold clues to a bombing.

A woman's body is found inside a burned mobile home and the autopsy reveals she was beaten, making this a murder.

After a man's body is discovered a few miles from his home, authorities trace the crime back to his house and question his wife.

A random serial sniper is plaguing Virginia and Maryland, with no profile of their victims.

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.

Pathologist examining the death of a politician who was running for re-election finds tiny puncture wounds at the autopsy.

The brutal murder of a construction site foreman looks like the work of a disgruntled employee, but forensic science points to an unlikely suspect.

A few drops of blood are the only clues a man's female killer leaves behind, but years later and hundreds of miles away investigators hear an intriguing story about an exotic dancer who got away with murder.

Car with three Secret Service agents collides with local deputy's car; investigation launched into who was responsible for the deadly car accident finds two very different conclusions.

Arson investigators attempt to determine the cause of the 1987 fire at the Kings Cross Underground Station in London.

Investigators determine if a computer crash which almost ruined a manufacturing company was accidental or deliberate sabotage.

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.

After police identify a murder victim thanks to her butterfly necklace, they discover several co-workers had vendettas against the victim.

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.

A woman tells investigators that a man broke into her home wearing only underwear and gloves, killed her boyfriend, and raped and terrorized her.

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.

A DNA dragnet catches a killer eight years after the kidnapping, rape and murder of a college coed in Oklahoma.

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