The Valseca siblings' lives are changed when their father is taken hostage in an orchestrated abduction.

A hairdresser-turned-detective uncovers the truth behind the murder of a teenage girl at a scenic spot on a Utah river.

When Nichole Payne and her son Taylor are found dead in their home, it takes nearly a decade to unravel what happened; for the first time on television, Nichole's children share what they saw the day their mother and brother were murdered.

A woman disappears while on her morning jog.

Detectives connect a series of seemingly random crimes to crack the case of a missing young man.

The murder of a California mother beloved by four men reopens a mystery surrounding another young woman's death that occurred decades earlier.

Convicted murderer Drew Peterson speaks out about the murder of his third wife and the disappearance of his fourth wife in his first network TV interview in more than a decade; insiders close to the case speak out, including Stacy Peterson's sister.

The Valseca siblings' lives are changed when their father is taken hostage in an orchestrated abduction.

A hairdresser-turned-detective uncovers the truth behind the murder of a teenage girl at a scenic spot on a Utah river.

When Nichole Payne and her son Taylor are found dead in their home, it takes nearly a decade to unravel what happened; for the first time on television, Nichole's children share what they saw the day their mother and brother were murdered.

A woman finds her way back to her family after being kidnapped 30 years earlier.

Police begin to doubt a man's claim that his wife was murdered by a friend.

A man who was recently acquitted of the murder of his ex-girlfriend's 12-year-old son tells his story; interview with the victim's mother and key players in the case.

The investigation into the disappearance of a mother of three in Colorado reveals she was living a double life.

A romantic Mediterranean cruise intended to rekindle the love between a woman and her ex-husband leads to her vanishing; the investigation reveals secret recordings, a surprising star witness and an undercover hit man.

The investigation into the disappearance of a young mother in the Pacific Northwest leads authorities to an estranged husband, an ex-boyfriend and a suspicious neighbor.

When a young Army medic based at Ft. Bragg, N.C., goes missing, police can't solve the case despite having a suspect until an unorthodox private investigator steps in to help.

A woman finds her way back to her family after being kidnapped 30 years earlier.

Police begin to doubt a man's claim that his wife was murdered by a friend.

A man who was recently acquitted of the murder of his ex-girlfriend's 12-year-old son tells his story; interview with the victim's mother and key players in the case.

The investigation into the disappearance of a mother of three in Colorado reveals she was living a double life.

A romantic Mediterranean cruise intended to rekindle the love between a woman and her ex-husband leads to her vanishing; the investigation reveals secret recordings, a surprising star witness and an undercover hit man.

The investigation into the disappearance of a young mother in the Pacific Northwest leads authorities to an estranged husband, an ex-boyfriend and a suspicious neighbor.

When a young Army medic based at Ft. Bragg, N.C., goes missing, police can't solve the case despite having a suspect until an unorthodox private investigator steps in to help.

A woman finds her way back to her family after being kidnapped 30 years earlier.

Police begin to doubt a man's claim that his wife was murdered by a friend.

A man who was recently acquitted of the murder of his ex-girlfriend's 12-year-old son tells his story; interview with the victim's mother and key players in the case.

The investigation into the disappearance of a mother of three in Colorado reveals she was living a double life.

A romantic Mediterranean cruise intended to rekindle the love between a woman and her ex-husband leads to her vanishing; the investigation reveals secret recordings, a surprising star witness and an undercover hit man.

The investigation into the disappearance of a young mother in the Pacific Northwest leads authorities to an estranged husband, an ex-boyfriend and a suspicious neighbor.

When a young Army medic based at Ft. Bragg, N.C., goes missing, police can't solve the case despite having a suspect until an unorthodox private investigator steps in to help.

Over the course of a year, violent crimes are committed against two women from the same church; evidence is revealed that suggests the two cases are not just coincidences.

Campus cops make a terrible discovery in a dorm room after a boyfriend's weekend visit goes horribly wrong.

The murder of a wealthy hotel heir ignites a feud between his wife and stepdaughter.

A teen's murder shakes a Nevada community, especially when two unlikely people make confessions.

Rachel Buffett, whose former fiance, Daniel Wozniak, was convicted of two grisly murders, talks about being at the center of the investigation.

After Todd Chance is murdered, police follow a trail of video evidence as they work to track down the killer.

When the death of a 59-year-old father is found to be unrelated to his ongoing health issues, police begin an investigation and question some of his family members.

Over the course of a year, violent crimes are committed against two women from the same church; evidence is revealed that suggests the two cases are not just coincidences.

Campus cops make a terrible discovery in a dorm room after a boyfriend's weekend visit goes horribly wrong.

The murder of a wealthy hotel heir ignites a feud between his wife and stepdaughter.

A teen's murder shakes a Nevada community, especially when two unlikely people make confessions.

Rachel Buffett, whose former fiance, Daniel Wozniak, was convicted of two grisly murders, talks about being at the center of the investigation.

After Todd Chance is murdered, police follow a trail of video evidence as they work to track down the killer.

When the death of a 59-year-old father is found to be unrelated to his ongoing health issues, police begin an investigation and question some of his family members.

Over the course of a year, violent crimes are committed against two women from the same church; evidence is revealed that suggests the two cases are not just coincidences.

Campus cops make a terrible discovery in a dorm room after a boyfriend's weekend visit goes horribly wrong.

The murder of a wealthy hotel heir ignites a feud between his wife and stepdaughter.

A teen's murder shakes a Nevada community, especially when two unlikely people make confessions.

Rachel Buffett, whose former fiance, Daniel Wozniak, was convicted of two grisly murders, talks about being at the center of the investigation.

After Todd Chance is murdered, police follow a trail of video evidence as they work to track down the killer.

When the death of a 59-year-old father is found to be unrelated to his ongoing health issues, police begin an investigation and question some of his family members.

Two tenacious sisters determined to fulfill a promise investigate the mystery surrounding their mother's death.

Interviews with former journalist Amanda Lindhout and the undercover agent who spearheaded the international manhunt for the individual responsible for her 2008 kidnapping and torture in Somalia.

A Tennessee resident is murdered in her bedroom; investigators have little evidence and struggle to find answers.

When Tina Sandoval disappears, her parents and loved ones spend years searching for her; a secret she was keeping may lead to clues about what happened to her.

A California woman's two former husbands are mysteriously murdered, nearly 20 years apart.

Kathleen Schroll makes a phone call right before her death where she identifies her killer, which leads to an arrest. Two trials and 12 years later, authorities begin to wonder who was really the victim.

When two tragic deaths occur within one week of each other in a wealthy city in California, families begin to wonder what happened inside a beachfront mansion.

Two tenacious sisters determined to fulfill a promise investigate the mystery surrounding their mother's death.

Interviews with former journalist Amanda Lindhout and the undercover agent who spearheaded the international manhunt for the individual responsible for her 2008 kidnapping and torture in Somalia.

A Tennessee resident is murdered in her bedroom; investigators have little evidence and struggle to find answers.

When Tina Sandoval disappears, her parents and loved ones spend years searching for her; a secret she was keeping may lead to clues about what happened to her.

A California woman's two former husbands are mysteriously murdered, nearly 20 years apart.

Kathleen Schroll makes a phone call right before her death where she identifies her killer, which leads to an arrest. Two trials and 12 years later, authorities begin to wonder who was really the victim.

When two tragic deaths occur within one week of each other in a wealthy city in California, families begin to wonder what happened inside a beachfront mansion.

Two tenacious sisters determined to fulfill a promise investigate the mystery surrounding their mother's death.

Interviews with former journalist Amanda Lindhout and the undercover agent who spearheaded the international manhunt for the individual responsible for her 2008 kidnapping and torture in Somalia.

A Tennessee resident is murdered in her bedroom; investigators have little evidence and struggle to find answers.

When Tina Sandoval disappears, her parents and loved ones spend years searching for her; a secret she was keeping may lead to clues about what happened to her.

A California woman's two former husbands are mysteriously murdered, nearly 20 years apart.

Kathleen Schroll makes a phone call right before her death where she identifies her killer, which leads to an arrest. Two trials and 12 years later, authorities begin to wonder who was really the victim.

When two tragic deaths occur within one week of each other in a wealthy city in California, families begin to wonder what happened inside a beachfront mansion.

Officials identify a man's remains more than 20 years after his mysterious disappearance.

Kidnappers target a 24-year-old American woman living in South America.

A woman claims to have been abducted from her multimillion-dollar home, leaving more than 150 investigators to search for her.

After finding his wife and two children dead, a former Indiana state trooper spends 13 years trying to clear his name.

A community comes together to search for a young woman who goes missing from a Halloween party.

Authorities investigate multiple suspects when a vibrant young woman disappears on her son's fifth birthday.

When Tom Foley becomes the top suspect in his wife's murder, he spends the next two years trying to prove his innocence.

Officials identify a man's remains more than 20 years after his mysterious disappearance.

Kidnappers target a 24-year-old American woman living in South America.

A woman claims to have been abducted from her multimillion-dollar home, leaving more than 150 investigators to search for her.

After finding his wife and two children dead, a former Indiana state trooper spends 13 years trying to clear his name.

A community comes together to search for a young woman who goes missing from a Halloween party.

Authorities investigate multiple suspects when a vibrant young woman disappears on her son's fifth birthday.

When Tom Foley becomes the top suspect in his wife's murder, he spends the next two years trying to prove his innocence.

Officials identify a man's remains more than 20 years after his mysterious disappearance.

Kidnappers target a 24-year-old American woman living in South America.

A woman claims to have been abducted from her multimillion-dollar home, leaving more than 150 investigators to search for her.

After finding his wife and two children dead, a former Indiana state trooper spends 13 years trying to clear his name.

A community comes together to search for a young woman who goes missing from a Halloween party.

Authorities investigate multiple suspects when a vibrant young woman disappears on her son's fifth birthday.

When Tom Foley becomes the top suspect in his wife's murder, he spends the next two years trying to prove his innocence.

A teen driver discusses what happened the night she was involved in a car crash that left a pregnant woman and her son dead; authorities try to determine if the incident was an accident or intentional.

The drug-related death of a 17-year-old girl sheds light on a new class of synthetic drugs that has law enforcement agencies on alert.

The unbelievable murder of Carol Kennedy, a popular college professor, artist and mother.

Rocky Mountain National Park rangers question whether a woman's fatal fall was an accident or the result of an act of violence.

It was called "the trial of the century" and, decades after the polarizing case, questions remain; hear answers and insights through interviews done over the years, rare footage and revealing conversations with key players who offer new details.

A woman goes for a walk during a snowstorm and never returns.

Co-lead investigator in the Steven Avery case Tom Fassbender discusses the case and allegations investigators coerced Avery's nephew, Brendan Dassey, into making a false confession.

A teen driver discusses what happened the night she was involved in a car crash that left a pregnant woman and her son dead; authorities try to determine if the incident was an accident or intentional.

The drug-related death of a 17-year-old girl sheds light on a new class of synthetic drugs that has law enforcement agencies on alert.

The unbelievable murder of Carol Kennedy, a popular college professor, artist and mother.

Rocky Mountain National Park rangers question whether a woman's fatal fall was an accident or the result of an act of violence.

It was called "the trial of the century" and, decades after the polarizing case, questions remain; hear answers and insights through interviews done over the years, rare footage and revealing conversations with key players who offer new details.

A woman goes for a walk during a snowstorm and never returns.

Co-lead investigator in the Steven Avery case Tom Fassbender discusses the case and allegations investigators coerced Avery's nephew, Brendan Dassey, into making a false confession.

A teen driver discusses what happened the night she was involved in a car crash that left a pregnant woman and her son dead; authorities try to determine if the incident was an accident or intentional.

The drug-related death of a 17-year-old girl sheds light on a new class of synthetic drugs that has law enforcement agencies on alert.

The unbelievable murder of Carol Kennedy, a popular college professor, artist and mother.

Rocky Mountain National Park rangers question whether a woman's fatal fall was an accident or the result of an act of violence.

It was called "the trial of the century" and, decades after the polarizing case, questions remain; hear answers and insights through interviews done over the years, rare footage and revealing conversations with key players who offer new details.

A woman goes for a walk during a snowstorm and never returns.

Co-lead investigator in the Steven Avery case Tom Fassbender discusses the case and allegations investigators coerced Avery's nephew, Brendan Dassey, into making a false confession.

Two years after the disappearance of his wife, Josh Powell kills his two sons and himself; Josh's last in-depth TV interview; a 911 dispatcher discusses the emergency call placed by a social worker.

Two Tulsa brothers fight for more than 20 years to prove their innocence after they were wrongfully convicted for separate murders.

The investigation into the death of a woman whose remains were found in her Frisco, Texas, garage leads detectives to a series of suspects with connections to the victim's complicated and secretive life.

Police initially suspect natural causes as they investigate a man's death, until they learn about an unconventional love triangle, which points the investigation in a new direction.

When Susan Woods doesn't show up for work, she is soon discovered dead in her bathtub; as police search for answers, they find a trail of victims.

A man dies in a shooting incident after tempers flare in a confrontation in Montana's Glacier National Park.

Police investigate whether the shooting of a young woman in Utah was an accident or something more sinister.

Two years after the disappearance of his wife, Josh Powell kills his two sons and himself; Josh's last in-depth TV interview; a 911 dispatcher discusses the emergency call placed by a social worker.

Two Tulsa brothers fight for more than 20 years to prove their innocence after they were wrongfully convicted for separate murders.

The investigation into the death of a woman whose remains were found in her Frisco, Texas, garage leads detectives to a series of suspects with connections to the victim's complicated and secretive life.

Police initially suspect natural causes as they investigate a man's death, until they learn about an unconventional love triangle, which points the investigation in a new direction.

When Susan Woods doesn't show up for work, she is soon discovered dead in her bathtub; as police search for answers, they find a trail of victims.

A man dies in a shooting incident after tempers flare in a confrontation in Montana's Glacier National Park.

Police investigate whether the shooting of a young woman in Utah was an accident or something more sinister.

Two years after the disappearance of his wife, Josh Powell kills his two sons and himself; Josh's last in-depth TV interview; a 911 dispatcher discusses the emergency call placed by a social worker.

Two Tulsa brothers fight for more than 20 years to prove their innocence after they were wrongfully convicted for separate murders.

The investigation into the death of a woman whose remains were found in her Frisco, Texas, garage leads detectives to a series of suspects with connections to the victim's complicated and secretive life.

Police initially suspect natural causes as they investigate a man's death, until they learn about an unconventional love triangle, which points the investigation in a new direction.

When Susan Woods doesn't show up for work, she is soon discovered dead in her bathtub; as police search for answers, they find a trail of victims.

A man dies in a shooting incident after tempers flare in a confrontation in Montana's Glacier National Park.

Police investigate whether the shooting of a young woman in Utah was an accident or something more sinister.

Investigators are suspicious when a wealthy former radio DJ mysteriously disappears from his yacht in the Pacific Ocean.

A charismatic pastor's dark secrets come to light after his wife's mysterious death; the case shattered a congregation and exposed the cost of their unshakable trust.

A top-ranking officer in the Canadian military pleaded guilty to a number of crimes, from home invasions and lingerie theft to murder.

A wife and mother survives an attack in her home and a shot to the head; authorities search for a motive.

When a woman is found dead in her SUV, the investigation into her murder reveals a tangled web of sex and lies; interviews about the prominent family's dark secrets.

A look at the crimes committed by Charles Manson and his followers in 1969, including archival footage and interviews with those close to the events.

The deadly 2020 shooting at U.S. District Court Judge Esther Salas' home, which killed her son and critically injured her husband.

Investigators are suspicious when a wealthy former radio DJ mysteriously disappears from his yacht in the Pacific Ocean.

A charismatic pastor's dark secrets come to light after his wife's mysterious death; the case shattered a congregation and exposed the cost of their unshakable trust.

A top-ranking officer in the Canadian military pleaded guilty to a number of crimes, from home invasions and lingerie theft to murder.

A wife and mother survives an attack in her home and a shot to the head; authorities search for a motive.

When a woman is found dead in her SUV, the investigation into her murder reveals a tangled web of sex and lies; interviews about the prominent family's dark secrets.

A look at the crimes committed by Charles Manson and his followers in 1969, including archival footage and interviews with those close to the events.

The deadly 2020 shooting at U.S. District Court Judge Esther Salas' home, which killed her son and critically injured her husband.

Investigators are suspicious when a wealthy former radio DJ mysteriously disappears from his yacht in the Pacific Ocean.

A charismatic pastor's dark secrets come to light after his wife's mysterious death; the case shattered a congregation and exposed the cost of their unshakable trust.

A top-ranking officer in the Canadian military pleaded guilty to a number of crimes, from home invasions and lingerie theft to murder.

A wife and mother survives an attack in her home and a shot to the head; authorities search for a motive.

When a woman is found dead in her SUV, the investigation into her murder reveals a tangled web of sex and lies; interviews about the prominent family's dark secrets.

A look at the crimes committed by Charles Manson and his followers in 1969, including archival footage and interviews with those close to the events.

The deadly 2020 shooting at U.S. District Court Judge Esther Salas' home, which killed her son and critically injured her husband.

Investigators are suspicious when a wealthy former radio DJ mysteriously disappears from his yacht in the Pacific Ocean.

A random post on a social networking site changes everything about a case that put two brothers in prison for more that two decades.

The investigation into the murder of a pregnant woman leads to a former professional football player and several women associated with him.

A wife and mother is handcuffed and taken into an unmarked car by a blond woman on a Monday morning, but her family is unable to find any record of the arrest.

A chance encounter on the Pacific Coast Highway with a woman he first spoke to in a jail cell leads Keith Morrison to reexamine the mysterious death of Las Vegas casino magnate Ted Binion.

A hunting safari in Zambia's Kafue National Park ends in a nightmare when a shot rings out from the cabin of dentist Dr. Larry Rudolph and his wife Bianca.

San Diego detectives investigate the deaths of a young woman and her 10-month-old child.

A chance encounter by custom agents leads to a break in the case of a mother who disappeared days before she was supposed to move to a new city with her young son; 20 years after the incident, a witness speaks out.

A random post on a social networking site changes everything about a case that put two brothers in prison for more that two decades.

The investigation into the murder of a pregnant woman leads to a former professional football player and several women associated with him.

A wife and mother is handcuffed and taken into an unmarked car by a blond woman on a Monday morning, but her family is unable to find any record of the arrest.

A chance encounter on the Pacific Coast Highway with a woman he first spoke to in a jail cell leads Keith Morrison to reexamine the mysterious death of Las Vegas casino magnate Ted Binion.

A hunting safari in Zambia's Kafue National Park ends in a nightmare when a shot rings out from the cabin of dentist Dr. Larry Rudolph and his wife Bianca.