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

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

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

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.

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

An obscure print found at a crime scene.

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

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

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

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

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.

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

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.

He was a family-man, living in a New Jersey suburb with his wife and three kids but unbeknownst to his neighbors, Richard Kuklinski held a dark secret: he was the Iceman, a cold-blooded killer.

For many years, the Iceman, Richard Kuklinski, had literally gotten away with murder, but investigators were on to him; there was very little evidence, connecting the Iceman to his crimes.

A string of horrifying fires plagues California in the Eighties and Nineties, one of them fatally trapping four people inside.

In a race against time, investigators hunt for an arsonist setting devastating fires across California; to their complete shock, the man responsible turns out to be none other than renowned fire investigator Captain John Orr.

From 1987 to 1992, rapes, abductions and murders of young women occur north of the U.S.-Canadian border; a tip leads cops to an unlikely suspect: a blond, blue-eyed accountant who lives with his wife in a pink house in the suburbs.

From 1987 to 1992, rapes, abductions and murders of young women occur north of the U.S.-Canadian border; a tip leads cops to an unlikely suspect: a blond, blue-eyed accountant who lives with his wife in a pink house in the suburbs.

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

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

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

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

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

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

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

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

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

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

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.

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

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.

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.

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

A man is murdered in a drive-by shooting. When a mobile phone trace incriminates a killer, it's up to a forensic geologist to find evidence that he was at the scene.

When a teenage girl is found dead, her boyfriend confesses to her murder. However, in a strange twist, so does another man; police must determine which is the killer.

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

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

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

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

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

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

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.

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.

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

A man is murdered in a drive-by shooting. When a mobile phone trace incriminates a killer, it's up to a forensic geologist to find evidence that he was at the scene.

When a teenage girl is found dead, her boyfriend confesses to her murder. However, in a strange twist, so does another man; police must determine which is the killer.

The hosts present some of the most important news stories, reports and happenings of national and international significance.

The hosts present some of the most important news stories, reports and happenings of national and international significance.

Melanie Zanona; Catherine Lucey; Isaac Arnsdorf.

Newlywed Lauren Phelps is stabbed 123 times as she fights for her life; her killer may blame his deadly rampage on cold medicine.

After Florida mother Gretchen Anthony, 51, goes missing from her home, surveillance video tells a twisted tale of her final hours.

A romantic and scenic early morning boat ride turns deadly when Larry Isenberg falls overboard; investigators reveal the disappearance of half a million dollars, which could be motive for murder.

Twenty-four-year-old Alex Woodworth is brutally stabbed 16 times and left for dead hanging halfway out of the killer's car; as investigators peel back the layers, it's revealed the killer's many lovers is motive for murder.

Recently divorced mom-of-three Ingrid Lyne goes back into the dating scene and meets a man online, but her date at a baseball game will be her last; Seattle residents and investigators are shocked by a chilling crime scene.

A high school gym teacher gives his friend a ride home but never returns; his wife and friend receive letters saying he started a new life, but they suspect foul play despite no body being discovered.

A 16-year-old girl is killed in her own home by her mother and father. Her parents said they acted in self-defense, but the forensic evidence indicates otherwise.

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

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.

The derailment of the Sunset Limited was the deadliest train crash in U.S. history killing 47 passengers and crew with several more injured.

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

A discarded sleeping bag, containing bloody sneakers and a purse, leads police to the body of a young woman; a mark found on the victim's body enables police to track the killer.

A woman's apparent accidental death begins to look fishy after police uncover a letter written by the victim days before her untimely death.

An Alaskan trooper finds a woman's body beside a frozen road, but evidence is scant even after a suspected murder weapon is found.

Police link a clump of hair discovered in an isolated area with a woman who disappeared 20 years ago.

A news anchor is shot to death outside her home in an apparent crime of passion by a fan; a police dog tracks the scent of the killer back to the crime scene.

A fire, caused by an unattended cigarette, kills the estranged wife of a police officer; forensic scientists discover that the cause is far more complicated.

A trio of men, responsible for several bank robberies, leaves no evidence behind; forensic scientists help catch them by looking at the criminals' posture and clothing.

When a woman's bone marrow test reveals arsenic poisoning, investigators try to determine if it is due to groundwater contamination or something more sinister.

A missing bank president's body is found floating in a lake; the duct tape used in binding him to a chair helps solve the crime.

A husband was shot and killed, forensic psychiatry helped the wife to remember the details for what happened.

The body of a 16-year-old girl is discovered nine months after her disappearance; forensic scientists find clues that paint a virtual portrait of her killer.

A young woman falls to her death in what appears to be a tragic accident; a forensic exam of photos taken at the scene tells a different story.

The derailment of the Sunset Limited was the deadliest train crash in U.S. history killing 47 passengers and crew with several more injured.

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

A discarded sleeping bag, containing bloody sneakers and a purse, leads police to the body of a young woman; a mark found on the victim's body enables police to track the killer.

A woman's apparent accidental death begins to look fishy after police uncover a letter written by the victim days before her untimely death.

An Alaskan trooper finds a woman's body beside a frozen road, but evidence is scant even after a suspected murder weapon is found.

Police link a clump of hair discovered in an isolated area with a woman who disappeared 20 years ago.

A news anchor is shot to death outside her home in an apparent crime of passion by a fan; a police dog tracks the scent of the killer back to the crime scene.

A fire, caused by an unattended cigarette, kills the estranged wife of a police officer; forensic scientists discover that the cause is far more complicated.

A trio of men, responsible for several bank robberies, leaves no evidence behind; forensic scientists help catch them by looking at the criminals' posture and clothing.

When a woman's bone marrow test reveals arsenic poisoning, investigators try to determine if it is due to groundwater contamination or something more sinister.

A missing bank president's body is found floating in a lake; the duct tape used in binding him to a chair helps solve the crime.

A husband was shot and killed, forensic psychiatry helped the wife to remember the details for what happened.

The body of a 16-year-old girl is discovered nine months after her disappearance; forensic scientists find clues that paint a virtual portrait of her killer.

A young woman falls to her death in what appears to be a tragic accident; a forensic exam of photos taken at the scene tells a different story.

A gruesome find in a small town church sends investigators searching for a killer.

An insurance agent is shot execution style in his office, but the killer leaves no fingerprints, and there are no murder weapon found at the scene; then investigators discover a critical clue invisible to the naked eye that cracks the case.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

When college-aged women in Charlottesville, Va. go missing, the search for answers leads authorities to local star athlete Jesse Matthew Jr.; in a shocking story, two women are killed, but another survives to bring the murderer to justice.

When college-aged women in Charlottesville, Va. go missing, the search for answers leads authorities to local star athlete Jesse Matthew Jr.; in a shocking story, two women are killed, but another survives to bring the murderer to justice.

Sammy the Bull Gravano was the right-hand man to mafia kingpin, John Gotti and carried out multiple murders; after his arrest, he breaks the sacred oath of silence and cuts a deal with the government, testifying against his former boss.

Sammy the Bull Gravano was the right-hand man to mafia kingpin, John Gotti and carried out multiple murders; after his arrest, he breaks the sacred oath of silence and cuts a deal with the government, testifying against his former boss.

Haunted by her mother's long-ago disappearance, a woman undertakes an investigation of her own and stumbles upon a dark family secret.

The robbery and brutal murder of an elderly couple goes unsolved for 10 years; a forensic scientist makes history when he solves the crime.

A man is charged with the murder of a wrestling champion; six years later, a forensic animator testifies on his behalf.

A 19-year-old girl is found dead in her car in what appears to be a suicide; police discover that the victime was involved in a love quadrangle, giving several people motive to kill.

Fifteen years after a man disappears, using a metal detector, police find evidence which proves what had happened.

The body of a young California co-ed under an isolated interstate ramp sets off an investigation; San Diego police have no idea who would want her dead, but they discover a tiny, unique fiber on the victim's clothing.

Police become suspicious of a man who reported his wife missing 15 years after doing the same thing with his first wife.

While investigating the case of a Colorado hunter shot three times and killed, police suspect two murder weapons, and two killers, but forensic evidence points them closer to home.

A serial arsonist burns thousands of California homes and businesses.

A small community in upstate New York is devastated when a car accident claims the life of a well-respected nurse.

A woman disappears without a trace, and police learn two other women vanished under similar circumstances.

Hikers near Anchorage, Alaska discover a body wrapped in sheets edged in orange stitching; they discover threads of evidence clinging to the sheet.

The son of a murder victim contacts the police when a flight attendant is brutally murdered in a remarkably similar way.

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.

A real estate tycoon must have had a premonition about foul play, as he wrote it in his will.

The cold-blooded murder of an American tourist in a Mexican resort causes law enforcement to focus on both sides of the border.

When a prominent banker's wife is kidnapped, the trail leads police on a wild goose chase; they track down disgruntled bank customers and examine computer fonts.

A man has no recollection of events after stabbing his wife and holding her head underwater in a swimming pool.

Fifteen years after a man disappears, using a metal detector, police find evidence which proves what had happened.

The body of a young California co-ed under an isolated interstate ramp sets off an investigation; San Diego police have no idea who would want her dead, but they discover a tiny, unique fiber on the victim's clothing.

Police become suspicious of a man who reported his wife missing 15 years after doing the same thing with his first wife.

While investigating the case of a Colorado hunter shot three times and killed, police suspect two murder weapons, and two killers, but forensic evidence points them closer to home.

A serial arsonist burns thousands of California homes and businesses.

A small community in upstate New York is devastated when a car accident claims the life of a well-respected nurse.

A woman disappears without a trace, and police learn two other women vanished under similar circumstances.

Hikers near Anchorage, Alaska discover a body wrapped in sheets edged in orange stitching; they discover threads of evidence clinging to the sheet.

The son of a murder victim contacts the police when a flight attendant is brutally murdered in a remarkably similar way.

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.

A real estate tycoon must have had a premonition about foul play, as he wrote it in his will.

The cold-blooded murder of an American tourist in a Mexican resort causes law enforcement to focus on both sides of the border.

When a prominent banker's wife is kidnapped, the trail leads police on a wild goose chase; they track down disgruntled bank customers and examine computer fonts.

A man has no recollection of events after stabbing his wife and holding her head underwater in a swimming pool.

A healthy, young mother mysteriously dies after a minor traffic accident triggering an investigation.

Investigators search for clues after a body is discovered in a watery grave.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

George Michael's life as international super star comes to a mysterious and tragic end on Christmas Eve 2016; family and fans were shocked by his sudden death.

It was the shocking affair that nearly toppled a Presidency - Bill Clinton and 21-year-old White House intern Monica Lewinsky.

It was the shocking affair that nearly toppled a presidency; Bill Clinton and a 21-year-old White House intern, Monica Lewinsky.

At the young age of 23, New England Patriots star player Aaron Hernandez is set up for greatness; less than a year later, a body is found riddled with bullets only a short distance from Hernandez's home.

A fire investigator determines if a kerosene heater is the cause of a fire that killed one person or if it was murder.

California police in 1957 search for a murderer, but the case goes cold; 50 years after a crime is committed, advances in computer technology determine the killer.

Investigators piece together tiny clues at the scene of a hit-and-run accident; their findings help to track down the offending driver.

Investigators determine what caused a house fire that killed an elderly couple and whether the victims' son is responsible.

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.

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

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.

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.

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

At first glance it appears a young woman suffocated, but further investigation shows the scene was staged.

A killer is careless when a home is destroyed by fire and a young boy is missing.

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.

An irrigation canal murder remains unsolved until a similar murder occurs.

The light of day and DNA picture painted by molecular biologist reveals new clues about a nighttime traffic accident.

On Valentine's Day, an obstetrician finds his wife dead and calls 911; police discover inconsistencies between the blood spatter evidence and his version of events.

Weed analysis and photogrammetry are used to help solve the 1995 murder of a California teenager is found dead after disappearing from her home.

When police recover the submerged car of missing man, they find no body; the investigation that follows uncovers a deadly obsession and the motive for murder.

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.

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

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.

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.

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

At first glance it appears a young woman suffocated, but further investigation shows the scene was staged.

A killer is careless when a home is destroyed by fire and a young boy is missing.

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.

An irrigation canal murder remains unsolved until a similar murder occurs.

The light of day and DNA picture painted by molecular biologist reveals new clues about a nighttime traffic accident.

On Valentine's Day, an obstetrician finds his wife dead and calls 911; police discover inconsistencies between the blood spatter evidence and his version of events.

Weed analysis and photogrammetry are used to help solve the 1995 murder of a California teenager is found dead after disappearing from her home.

When police recover the submerged car of missing man, they find no body; the investigation that follows uncovers a deadly obsession and the motive for murder.

The murder of teacher's aide leaves a hole in the heart of her small community; as rumors spread about suspects, the actual perpetrator slips further away.

Father and teacher are found hanging naked from a tree with the letters F-E-D on his chest; with barely any evidence to work with, investigators turn to these letters for answers.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

Barbara Kendhammer suffers fatal injuries after a heavy pipe impales the windshield of her car, but evidence at the crime scene tells a different story.

10-year-old Zahra Baker survived cancer twice but lost her leg and hearing; when she disappears from her bedroom in the middle of the night, investigators are puzzled by a ransom note left at the scene, but her fate is worse than imagined.

A young mother of two perishes in a raging house fire, but her autopsy reveals the cause of death was not asphyxiation but a bullet wound to the head; forensics uncover the killer.

Shayna Hubers and Ryan Poston have a match made in heaven, then Ryan winds up dead in a pool of blood with a gunshot wound to his face; stunning interrogation tapes leave police in disbelief and lead investigators to a surprising motive.

Emergency dispatch recieved a call from a man who said his girlfriend shot and killed herself. But the wound was not self-inflicted.

Investigators piece together evidence found at the scene of a Native American woman's murder; the tyre tracks and shoe impressions could lead them to the killer.

Experts seek answers to a young businesswoman's death just before she was to testify in a criminal trial.

An anonymous caller reports the rape and murder of a dry cleaner employee; two eyewitnesses tell two similar but not identical stories.

Police blame a botched robbery when an eccentric elderly millionaire is found dead, but the motive could be wrong.

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.

Retracing the steps of real investigations with interviews and dramatic re-creations as experts draw on forensic science to solve baffling crimes and other mysteries.

Police suspect a gay college student's slaying is a hate crime until forensic evidence points the case in another direction.

In a wealthy area of Philadelphia, police are called to the scene of what seems like a regular accidental drowning; the investigation begins to focus on one person who has many reasons to want the victim dead.

Two women are murdered in the same town and police fear a serial killer is on the loose, further investigation finds that they were both close to the same man.

A young woman is found dead on a golf course in the Bahamas; the grass on that course is so distinctive that it had evidentiary value; the evidence leds police to two suspects; each blamed the other, and they have to find out who the killer is.

A teenager goes missing after an evening of horseback riding; her body is found a month later, three miles from her home; the killer unknowingly leaves a trace of evidence behind, tiny but unmistakable clues that pointed to him and him alone.

When a popular disc jockey is found murdered in a community garden, police swing into action; a sniffer dog and a blood spatter expert led police to the killer and he'd been much closer than they realize.

Investigators unravel a twisted tale of lust, greed and deception after a woman claims her husband was gunned down by intruders.

Three seemingly unrelated deaths proved to be serial murders; the killer had been careful, he uses poison which had no taste or odour, fortunately for investigators, it also has a unique chemical signature.

A man is murdered in his sleep but no fingerprints are anywhere to be found; a shoe impression outside could lead to the killer.

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.

The owner of a restaurant is killed; investigators uncover tales of debt and deceit, but the case remains open, until one detective gets inspired by an earlier episode of "Forensic Files," and looks for clues in an empty holster.

Police blame a botched robbery when an eccentric elderly millionaire is found dead, but the motive could be wrong.

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.

Retracing the steps of real investigations with interviews and dramatic re-creations as experts draw on forensic science to solve baffling crimes and other mysteries.

Police suspect a gay college student's slaying is a hate crime until forensic evidence points the case in another direction.

In a wealthy area of Philadelphia, police are called to the scene of what seems like a regular accidental drowning; the investigation begins to focus on one person who has many reasons to want the victim dead.

Two women are murdered in the same town and police fear a serial killer is on the loose, further investigation finds that they were both close to the same man.

A young woman is found dead on a golf course in the Bahamas; the grass on that course is so distinctive that it had evidentiary value; the evidence leds police to two suspects; each blamed the other, and they have to find out who the killer is.

A teenager goes missing after an evening of horseback riding; her body is found a month later, three miles from her home; the killer unknowingly leaves a trace of evidence behind, tiny but unmistakable clues that pointed to him and him alone.

When a popular disc jockey is found murdered in a community garden, police swing into action; a sniffer dog and a blood spatter expert led police to the killer and he'd been much closer than they realize.

Investigators unravel a twisted tale of lust, greed and deception after a woman claims her husband was gunned down by intruders.

Three seemingly unrelated deaths proved to be serial murders; the killer had been careful, he uses poison which had no taste or odour, fortunately for investigators, it also has a unique chemical signature.

A man is murdered in his sleep but no fingerprints are anywhere to be found; a shoe impression outside could lead to the killer.

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.

The owner of a restaurant is killed; investigators uncover tales of debt and deceit, but the case remains open, until one detective gets inspired by an earlier episode of "Forensic Files," and looks for clues in an empty holster.

A single mom vanishes without a trace; foul play is confirmed when a truck toolbox opens with her body inside; homicide detectives investigate men she matched on dating sites, men from work, and a lover with a violent past.

A 20-year-old woman sets out on her bike and never returns; her body is found a few miles from her house with a gunshot wound to the head; years go by without any evidence or leads, until new investigators and technology breaks the case.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

A tale of murder, adultery, courtroom drama, and ultimately the death penalty; the story of Scott and Laci Peterson as told by those who lived it.

A tale of murder, adultery, courtroom drama, and ultimately the death penalty; the story of Scott and Laci Peterson as told by those who lived it.

Almost two years after a romance begins between small-town waitress Jodi Arias and successful businessman Travis Alexander, Travis is found brutally murdered in his shower at home.

Four years after the vicious killing of Travis Alexander, ex-girlfriend Jodi Arias stands trial for his murder; millions of people are captivated by the emerging lurid details of Jodi and Travis' erotic relationship.

A serial arsonist was on the loose in Washington, DC. Each of the fires was started with the same type of incendiary device. The perpetrator was very careful, and seemed to leave no evidence behind... but there were clues in the ashes and it was up to forensic scientists to find them.

A man becomes the prime suspect in his wife's death after forensic science raises questions about her apparent suicide.

Investigators on both sides of the Atlantic seek links between three homicides that look like professional executions.

Who put a bomb in the home of a 29-year-old woman and killed her?

A killer tried to destroy everything which could link them to the crime; but in doing so, they inadvertently created new forensic evidence, evidence which came to light using a technique never before used in a criminal investigation.

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

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

A child's death from flu-like symptoms triggers an investigation that ranges from the United States to Egypt and uncovers murder.

A couple is found dead in a car with broken windows but no shattered glass.

Key suspect has a solid alibi in the murder of a war veteran; but police get a lead by finding a new suspect with a sweet tooth.

A woman who appeared to have taken her own life told her sister that, if anything were to happen to her, there was a note in the china cabinet.

When an aspiring model turns up dead, police suspect her boyfriend. But must dig deeper for clues when he is cleared.

Tiny fibers and an asthma inhaler are the clues that lead officers to the killer of an off-duty policeman.

Investigators search the world of high rollers and offshore betting to solve the first triple homicide in Verona, Wisc.

Police search every apartment building in town when the body of a young girl found on an isolated farm holds a set of keys but no ID.

A man denies killing a pedestrian in hit-and-run, claiming he sold the car in question, and authorities track down the car to find critical evidence.

Three years later, a second autopsy determines who's right when a medical examiner and detectives disagree on the cause of death.

A killer tried to destroy everything which could link them to the crime; but in doing so, they inadvertently created new forensic evidence, evidence which came to light using a technique never before used in a criminal investigation.

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

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

A child's death from flu-like symptoms triggers an investigation that ranges from the United States to Egypt and uncovers murder.

A couple is found dead in a car with broken windows but no shattered glass.

Key suspect has a solid alibi in the murder of a war veteran; but police get a lead by finding a new suspect with a sweet tooth.

A woman who appeared to have taken her own life told her sister that, if anything were to happen to her, there was a note in the china cabinet.

When an aspiring model turns up dead, police suspect her boyfriend. But must dig deeper for clues when he is cleared.

Tiny fibers and an asthma inhaler are the clues that lead officers to the killer of an off-duty policeman.

Investigators search the world of high rollers and offshore betting to solve the first triple homicide in Verona, Wisc.

Police search every apartment building in town when the body of a young girl found on an isolated farm holds a set of keys but no ID.

A man denies killing a pedestrian in hit-and-run, claiming he sold the car in question, and authorities track down the car to find critical evidence.

Three years later, a second autopsy determines who's right when a medical examiner and detectives disagree on the cause of death.

A navy lieutenant is murdered while deployed out to sea; arsenic poisoning is the cause of death; investigators discover he had more than his fair share of enemies, but it takes years before investigators discover what really happened to him.

A building manager finds the lifeless body of a young woman in the bathtub; when questioned, an ex-con living downstairs lies to police; the lies do not prove murder and the case goes cold, then a new forensic tool examines the evidence.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

A murder victim's final moments are caught on tape; the crime scene looks like a clear robbery-murder; text evidence at first points to a jilted lover, but police identify a second suspect with a possible motive of deadly revenge.

A wounded woman crawls to call 911; her husband, who wants a divorce, gets a hard look from police, but he has an airtight alibi during the murder; forensic science of ballistics draws a direct connection.

A religious woman is shot execution style in the suburbs of Michigan; surveillance video reveals it was trio of killers; eventually, detectives get a break: a handwritten note.

Three sex workers are murdered and left along a river; a serial killer was on the loose-and for years the perp was never identified.

He is a sex offender and a murderer who attacks in a terrifying rage; this predator manages to evade capture for years, but he leaves evidence behind, his palm print; detectives are determined to put a face to the print.

When a house fire kills the only doctor in a small town, an arson investigation leads to the son of the doctor's nurse; when his alleged accomplice walks free, the prosecutor worries this might have been a miscarriage of justice.

A young woman is found murdered on the side of a rural driveway; the victim had been out with friends; the investigation would remain unsolved; until three decades later, when forensics from an unrelated crime helps break the case.

A hearing impaired 77-year-old on a road trip is shot to death because the man cannot hear his assailant's demands; random murders are among the hardest crimes to solve, but investigators are determined to bring this case to justice.

Hit-and-run boating accident that kills a popular young man causes investigators to search for one boat out of thousands.

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 young man was killed in a mysterious car crash, but the evidence at the scene led investigators to believe it was not an accident; forensic science revealed what really happened, and the truth devastated three families.

A woman is found dead, police use blood evidence and computer forensics to convince a jury that the murderer is guilty.

When an elderly woman dies in an apparent robbery-homicide, evidence suggests the suspect broke out of the house rather than breaking in.

Wealthy man is shot dead while his wife is forced to open their hidden safe, but they couldn't be identified because they were wearing ski masks.

The bomb was constructed to cause as much damage as possible and it did, killing the victim with deadly force and flame; a painstaking search yielded tiny clues, which identified the killer as surely as if he'd signed them.

A twelve-year-old girl claims that she was abducted and sexually assaulted. However, her story seems unbelievable until police discover fibers on her clothing.

Police are suspicious of numerous bloodstains when a woman has a fatal fall down the stairs.

A decade old case reopens, and a few seconds of a 911 call enable investigators to determine who is responsible for a murder.

A flawed envelope is an unlikely clue to identifying a killer who laced a water cooler with cyanide and caused the death of a woman.

A clue no bigger than a thumbtack leads investigators to a trio of killers.

For ten years, the disappearance of a college co-ed remained a mystery; new scientific testing cast a different light on a man who had been a suspect all along.

Tipster is found dead after revealing that a woman's death 16 years ago was murder.

The murder of 53-year-old Paul Gruber is examined and the evidence points to Darryl Robin Kuehl, who was later convicted of the crime.

Forensic science is used to determine if a woman's death was a botched robbery or intentional murder.

Detectives discover new clues left by a stalker's letter to his victim.

A killer is careless when using a murder weapon that is unique and easily traceable.

When an elderly woman dies in an apparent robbery-homicide, evidence suggests the suspect broke out of the house rather than breaking in.

Wealthy man is shot dead while his wife is forced to open their hidden safe, but they couldn't be identified because they were wearing ski masks.

The bomb was constructed to cause as much damage as possible and it did, killing the victim with deadly force and flame; a painstaking search yielded tiny clues, which identified the killer as surely as if he'd signed them.

A twelve-year-old girl claims that she was abducted and sexually assaulted. However, her story seems unbelievable until police discover fibers on her clothing.

Police are suspicious of numerous bloodstains when a woman has a fatal fall down the stairs.

A decade old case reopens, and a few seconds of a 911 call enable investigators to determine who is responsible for a murder.

A flawed envelope is an unlikely clue to identifying a killer who laced a water cooler with cyanide and caused the death of a woman.

A clue no bigger than a thumbtack leads investigators to a trio of killers.

For ten years, the disappearance of a college co-ed remained a mystery; new scientific testing cast a different light on a man who had been a suspect all along.

Tipster is found dead after revealing that a woman's death 16 years ago was murder.

The murder of 53-year-old Paul Gruber is examined and the evidence points to Darryl Robin Kuehl, who was later convicted of the crime.

Forensic science is used to determine if a woman's death was a botched robbery or intentional murder.

Detectives discover new clues left by a stalker's letter to his victim.

A killer is careless when using a murder weapon that is unique and easily traceable.

Stories from across the world and refreshing conversations with Audie Cornish.

Stories from across the world and refreshing conversations with Audie Cornish.

In the fall of 1977, bodies of young women begin piling up in Los Angeles; almost all of the victims are nude, discarded on hillsides, and show signs of torture; it is nearly a year before two murders 1,200 miles away uncover the Hillside Stranglers.

In the fall of 1977, bodies of young women begin piling up in Los Angeles; almost all of the victims are nude, discarded on hillsides, and show signs of torture; it is nearly a year before two murders 1,200 miles away uncover the Hillside Stranglers.

While closing shop in Anchorage, Alaska, Samantha Koenig is approached by a man known in the community as a business owner and caring father who kidnaps her, triggering a manhunt.

While closing shop in Anchorage, Alaska, Samantha Koenig is approached by a man known in the community as a business owner and caring father who kidnaps her, triggering a manhunt.

John Gotti's expensive suits and swagger earn him the nickname Dapper Don; in reality, he is a man to be feared, a ruthless, dangerous Mafia gangster who orders hits on his enemies, his friends, and anyone who crosses him.

John Gotti's expensive suits and swagger earn him the nickname Dapper Don; in reality, he is a man to be feared, a ruthless, dangerous Mafia gangster who orders hits on his enemies, his friends, and anyone who crosses him.

When a high school athlete is killed in a hit and run accident, investigators hoped tiny paint chips and shards of plastic would lead them to the driver.

A woman is abducted and a month later found dead, then a tip leads investigators in the right direction.

How the bombs were made leads investigators in Colorado to find the perpetrator.

DNA profiling reveals clues leading to a killer's identity 20 years later.

A device intended to save lives proves to be the only witness to a mans death.

When a man dies after falling down the stairs, a witness says one thing and the evidence says another.

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 house burns to the ground and a woman's charred remains are found, investigators must determine whether it was an accident or arson.

An ammunition box and fluorescent fibers reveal the betrayal that led to the murder of a millionaire's family.

The kidnapping of Adolph Coors leads to one of the most intense manhunts in US history.

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.

When murder strikes a young girl, police quickly make an arrest, but cutting-edge technology from NASA proves they have the wrong suspect behind bars.

A man is found strangled and burned in his San Antonio apartment and the killer thinks he has destroyed all the evidence.

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.

Casino security cameras offer the final images of a woman just before she vanished without a trace.

A squashed tomato and a pinpoint reflection of light in a photo help catch a killer.

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.

Ten years after the murder of a rock singer, forensic scientists use evidence collected to finally bring her killer to justice.

A device intended to save lives proves to be the only witness to a mans death.

When a man dies after falling down the stairs, a witness says one thing and the evidence says another.

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 house burns to the ground and a woman's charred remains are found, investigators must determine whether it was an accident or arson.

An ammunition box and fluorescent fibers reveal the betrayal that led to the murder of a millionaire's family.

The kidnapping of Adolph Coors leads to one of the most intense manhunts in US history.

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.

When murder strikes a young girl, police quickly make an arrest, but cutting-edge technology from NASA proves they have the wrong suspect behind bars.

A man is found strangled and burned in his San Antonio apartment and the killer thinks he has destroyed all the evidence.

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.

Casino security cameras offer the final images of a woman just before she vanished without a trace.

A squashed tomato and a pinpoint reflection of light in a photo help catch a killer.

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.

Ten years after the murder of a rock singer, forensic scientists use evidence collected to finally bring her killer to justice.

Stories from across the world and refreshing conversations with Audie Cornish.

Stories from across the world and refreshing conversations with Audie Cornish.

Melanie Zanona; Catherine Lucey; Isaac Arnsdorf.

Mike Williams mysteriously disappears on his wedding anniversary, and it looks like he may have been eaten by alligators, but looks can be deceiving; a break in the case reveals secrets.

Colorado soccer mom Paige Birgfeld vanishes and a small town is left on edge; cops dig for clues and make a shocking discovery that this devoted mom is living a secret double life.

Churchgoers know something is up when pastor Matthew Winkler doesn't show up for services: he's found dead on his bedroom floor and twisted sex fantasies and dark family secrets start to surface.

A successful lawyer, Mormon family man, and father of five is shot down in cold blood at a Walgreens parking lot, but a closer look reveals a dirty office affair that turned into a dangerous game of Russian roulette.

Tattoo shop owner Dennis Abrahamsen is found brutally murdered and naked on a massage table in his home; evidence tells a story of a wild sex party gone wrong with a famous adult actress.

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.

When a man's wife kills herself 14 years after his college sweetheart committed suicide, police start to get suspicious.

A woman shot in her driveway had recently rejected a co-worker half her age.

A pair of tennis shoes are found near a victim who had been stabbed on the beach, less than ten yards from her hotel.

Three fingerprints on a window screen are enough for a print examiner to uncover the work of a serial killer.

With a long list of suspects, forensic experts agree on one thing in this brutal murder: the killer knew his victim.

The only lead to finding a serial killer on the loose is a bloody fingerprint on the body of a victim.

Groundbreaking tests reveal the race, eye color and hair color of the person responsible for killing two young women on Halloween night.

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

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

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

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

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 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 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.

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

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

Three fingerprints on a window screen are enough for a print examiner to uncover the work of a serial killer.

With a long list of suspects, forensic experts agree on one thing in this brutal murder: the killer knew his victim.

The only lead to finding a serial killer on the loose is a bloody fingerprint on the body of a victim.

Groundbreaking tests reveal the race, eye color and hair color of the person responsible for killing two young women on Halloween night.

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

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

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

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

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 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 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.

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

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

A massive explosion claims the life of a California farmhand, and authorities think it's an accidental death, but analysis of debris shows it's a bomb; investigators have few suspects until they hear ominous rumors about a jealous rage.

When a beautiful college student is stabbed to death in her Knoxville apartment, suspicion immediately falls on her roommate; a bloody shoe print left by the killer exposes a murderer with no history of violence and no reason to kill.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

The anchors share the latest stories about significant events that take place across the world and interview prominent figures.

In Chicago, community leader and part-time clown John Wayne Gacy leads a double life, transforming into a monster who preys on male teenagers and becomes the most prolific serial killer of his day.

In Chicago, community leader and part-time clown John Wayne Gacy leads a double life, transforming into a monster who preys on male teenagers and becomes the most prolific serial killer of his day.

Charles Manson is a violent predator who has powers of persuasion that make it possible for him to convince his hippie followers to brutally murder innocent strangers.

Charles Manson is a violent predator who has powers of persuasion that make it possible for him to convince his hippie followers to brutally murder innocent strangers.

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

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

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

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

A bag full of evidence recovered from an iced-over river helps to reveal the murderer of a businesswoman in her own shop.

Eyewitness to real estate agent's murder is put under forensic hypnosis in an attempt to help him recall the killer's face.

Police launch a search for a killer after a teenager returns home to find his father's body in a pool of blood.

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

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 man is found stabbed to death after a night in a strip club. A drop of blood on a bedspread becomes critical evidence five yeas later.

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