A man becomes the prime suspect when his parents are killed in a house fire.

Twenty years after the murder of a young mother, technology gives new light to evidence and points 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 wife of a serviceman was brutally murdered in the Philippines in 1991, investigators must reassemble a 5-1/4 computer disk cut to pieces with pinking shears to find the murderer.

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.

Stories from across the world and refreshing conversations.

Stories from across the world and refreshing conversations.

Melanie Zanona; Catherine Lucey; Isaac Arnsdorf.

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.

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.

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.

Blood splatter evidence contradicts an obstetrician's story who found his wife dead.

A missing teen is found dead several days later.

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

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

Police investigate a Native American woman's murder less than 10 miles from another murder scene.

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.

Investigation into an accidental drowning focuses on one person, with a million reasons to kill.

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.

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

Blood splatter evidence contradicts an obstetrician's story who found his wife dead.

A missing teen is found dead several days later.

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

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

Police investigate a Native American woman's murder less than 10 miles from another murder scene.

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.

Investigation into an accidental drowning focuses on one person, with a million reasons to kill.

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 popular handyman in a New Hampshire town is found murdered and investigators follow forensic clues to a shocking conclusion.

A young mother is murdered in a crowded parking lot in broad daylight.

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 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.

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.

Police are led to two suspects when a woman is found dead on a golf course.

Evidence leads directly to a killer when a teenager goes missing and a month later her body is found.

A sniffer dog and a blood splatter lead to the killer of a popular disc jockey.

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

Arsenic poisoning is found to be the cause of a woman's mysterious illness.

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.

Chilling tale of debt & deceit when the head chef of a restaurant is found dead.

Serial arsonist on the loose leaves no evidence.

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?

Fire wood found a a crime scene helps investigators locate a killer.

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.

Police are led to two suspects when a woman is found dead on a golf course.

Evidence leads directly to a killer when a teenager goes missing and a month later her body is found.

A sniffer dog and a blood splatter lead to the killer of a popular disc jockey.

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

Arsenic poisoning is found to be the cause of a woman's mysterious illness.

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.

Chilling tale of debt & deceit when the head chef of a restaurant is found dead.

Serial arsonist on the loose leaves no evidence.

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?

Fire wood found a a crime scene helps investigators locate a killer.

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 serial killer terrorizes a small Texas town.

A mysterious murder in an upscale community is solved by cell phone forensics.

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 9-year-old girl does not show up for dinner, leaving her mother fearing the worst; a tip comes from unexpected witnesses and leads directly to the killer.

A Washington town is shattered when a woman is murdered and her house goes up in flames; when the predator strikes again, police fear they are dealing with a serial killer.

In North Carolina, the grisly discovery of a woman's body has everyone puzzled; police must take a wild ride through the victim's past in order to finally catch the killer.

The small Wisconsin town of Tomahawk is stunned when Tracy Maurer is stabbed to death and it takes a tip from the rumor mill to close the case.

An older couple is found murdered and neighbors fear their quiet town is turning into the Wild West.

Chaos comes to the city of Warren, Mich., after the horrific murder of Charles Taylor, 84; researchers discover the identity of the cruel perpetrator and are shocked.

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, Wisconsin.

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.

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 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, Wisconsin.

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.

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.

After the brutal slaying of a young couple on a road trip, the victims' families begin receiving disturbing letters.

The unexpected and strange death of a health conscious woman prompts an investigation.

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.

Model Tara Lambert hires a hit man to kill her husband's ex-wife and put her in a wood chipper, but she doesn't know that cameras are rolling.

Chris Watts is convicted of murdering his wife and two daughters; secret videos document the chilling murders from start to finish, revealing lies, an affair and a cover-up.

Sasha Samsudean, 27, is found strangled to death in her luxury downtown Orlando, Fla., apartment; shocking surveillance video and a slew of clues ultimately lead investigators to the killer.

Beautiful college lacrosse player Yeardley Love is found murdered in her apartment, then the police arrest a member of a wealthy, prominent family, stunning the community.

Lululemon employee Jayna Murray is found stabbed to death inside one of the company's Washington, DC stores and her co-worker is found bound and bleeding in a room; different suspects emerge and evidence starts to point to someone on the inside.

Stephen Paddock lived the lifestyle of the rich and famous in Las Vegas until he killed fifty-eight people in October 2017.

Police are suspicious of a mysterious car crash that kills a young man.

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.

A bomb kills a man and a painstaking search yields tiny clues which precisely identify the killer.

When police doubt a young girl's story about being abused, fibers on her clothes help her case.

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.

Murderer killed innocent people to get the person he wanted.

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

The disappearance of a college co-ed goes unsolved for 10 years, until new testing sheds a different light.

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

Woman suspected something wrong with her father flew back a thousand miles to find his home empty.

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

Police are suspicious of a mysterious car crash that kills a young man.

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.

A bomb kills a man and a painstaking search yields tiny clues which precisely identify the killer.

When police doubt a young girl's story about being abused, fibers on her clothes help her case.

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.

Murderer killed innocent people to get the person he wanted.

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

The disappearance of a college co-ed goes unsolved for 10 years, until new testing sheds a different light.

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

Woman suspected something wrong with her father flew back a thousand miles to find his home empty.

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

After a young mother is found brutally murdered in her home, investigators find startling clues on her cell phone that could lead to her killer.

An amazing new forensic tool turns a cold case around.

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 2003, the wildly successful careers of master illusionists Siegfried and Roy comes to a shockingly abrupt end when one of the team's prized tigers bites Roy Horn on the neck and drags him off stage.

Roy tries to recover from severe wounds inflicted by his beloved tiger Mantacore; but excuses for the animal's behavior lose credibility.

On April 15th 2013, two bombs explode during the Boston Marathon, killing three spectators and injuring hundreds others.

With the Boston Bombing suspects identified as domestic terrorist brothers, the manhunt begins, and a terrifying crime spree ensues.

A deeper look into Tom Petty's life reveals physical and emotional afflictions that may have led to his death at age 66.

In 1993, James Raymond Jordan Sr. goes missing and his luxury car is found stripped and abandoned in North Carolina; clues point to a tragic crime.

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 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.

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 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 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.

Infidelity and suspicion threatens to break wealthy couple's family bond; one member hit with the death tax.

A family from Mississippi has a taste for sordid sex and poison that results in murder.

When small town hospitality leads to danger, one family member decides murder is the only way out.

Brotherly love turns to backstabbing, and murder, for the Levine family.

Envy and rumored flirtation among in-laws create toxic hostility which leads to a death.

In Exeter, N.H., residents realize a sadistic mastermind has been living in their midst when a body is unearthed from a shallow woodland grave.

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.

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 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.

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.

Stories from across the world and refreshing conversations.

Stories from across the world and refreshing conversations.

A mother of four goes missing right before testifying against her abusive boyfriend.

After a young mother goes missing, police suspect she may be taking a break somewhere with a new beau, while her family fears the worst.

After he clashes with co-workers, Tom Monfils mysteriously disappears on the job at a Green Bay, Wis., paper mill; when it begins to look like Monfils is the victim of murder, no one talks to detectives in what appears to be a conspiracy of silence.

In Phoenix, a string of late-night sexual assaults appear to be the work of a serial rapist, who targets women in their own homes while they sleep.

In Virginia, three Taiwanese family members disappear, and rumor has it they died overseas, but when detectives investigate, they find answers closer to home.

After 19-year-old Jamey Walker is kidnapped and murdered in 1981, her mother, Eleanor, dedicates the rest of her life to finding the killer.

A prominent psychiatrist and his adult son are killed execution style, and the case goes cold, then an attempted armored d car robbery provides a link to the double homicide.

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.

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.

Police get a big break when Mother Nature aids their investigation into the murder of a woman at her business.

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.

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.

Police get a big break when Mother Nature aids their investigation into the murder of a woman at her business.

Stories from across the world and refreshing conversations.

Stories from across the world and refreshing conversations.

Melanie Zanona; Catherine Lucey; Isaac Arnsdorf.

Mother of two Crystal McDowell vanishes as Hurricane Harvey rocks Houston; surveillance video leads investigators to her twisted killer.

Former model, Samira Frasch, was living a life of extravagance until tragedy struck; the mother of two is found dead at the bottom of her swimming pool and both her children are missing from the home.

Aspiring cosmetologist Shannon Graves is found dismembered inside a padlocked freezer but when another woman is spotted driving her car and going into her apartment, detectives discover a chilling cover-up.

Successful doctor and mom of two, Teresa Sievers, is found bludgeoned to death in her kitchen after returning home from a family vacation.

A 41-year-old mother of three was brutally stabbed nearly 200 times in front of her two youngest children; investigators reveal a sick and twisted motive behind the deadly rampage, and her daughter who witnessed the attack speaks for the first time.

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

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 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.

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

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 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.

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

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 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.

A nosy neighbor with a disturbing obsession becomes a suspect in a woman's murder at an upscale apartment complex; police discover an incredible link to an unrelated murder thousands of miles away.

A college student turns up dead and her boyfriend becomes a prime suspect when blood splatters are discovered on his wall.

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

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 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.

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

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 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.

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

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 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.

A nosy neighbor with a disturbing obsession becomes a suspect in a woman's murder at an upscale apartment complex; police discover an incredible link to an unrelated murder thousands of miles away.

A college student turns up dead and her boyfriend becomes a prime suspect when blood splatters are discovered on his wall.

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

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.

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.

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.

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

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

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

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

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 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.

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.

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.

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.

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.

Initially, there were no clues in the murder of Florida college student Michelle Herndon, until a small needle mark was found on the victim's arm.

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

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

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

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

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

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

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 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.

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.

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.

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.

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.

Initially, there were no clues in the murder of Florida college student Michelle Herndon, until a small needle mark was found on the victim's arm.

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

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

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.

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.

In a sleepy town, newlyweds are found shot dead in their home.

The crime scene of a murdered single mother contains a puzzling message from the killer.

A beloved custodian is found stabbed to death in his Kansas home leaving a town in shock.

A woman's body is found deep in the Pennsylvania forest; years of fuzzy clues lead to a close suspect.

It takes the police over a decade to gain enough evidence to bring Cindy Pavey's killer to justice.

Tammy Petrin is found shot to death at the local hamburger restaurant.

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.

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

Unsettling evidence is found in the rubble from a fire in a Seattle woman's apartment that is soon followed by another blaze just 100 feet from the first, with clues indicating a serial killer is at work.

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

Forensics investigate a clever inside job, in which finger prints, CCTV and DNA testing provide the keys to catching a thief and killer.