The battle between a wife and a mistress for one man's heart leads to a deadly car chase.

Money and greed tear two close-knit California families apart.

Mysterious deaths occur inside a traveling commune, starting an investigation that lasts more than a decade; two sisters -- former commune members -- reveal stories that involve lies, lust and greed.

Private investigator and former police officer Taylor Wright vanishes, but detectives think there is more to the story after her girlfriend receives strange text messages from Taylor's phone.

An advocate for missing and murdered Indigenous women searches for answers in the disappearance of her niece and exposes cracks in law enforcement.

The investigation into a businessman's murder leads to an arrest, but as friends and neighbors rally around the accused, it begins to look like they have the wrong man.

A 64-year-old man is charged with murder after shooting two unarmed teenagers who broke into his home.

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.

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

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

As detectives struggle to find leads in the murder of a college student, the perpetrator strikes again.

A soon-to-be bride is caught in the middle of a twisted murder plot that has detectives questioning if she played a role in it.

The investigation into a businessman's murder leads to an arrest, but as friends and neighbors rally around the accused, it begins to look like they have the wrong man.

A 64-year-old man is charged with murder after shooting two unarmed teenagers who broke into his home.

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.

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

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

As detectives struggle to find leads in the murder of a college student, the perpetrator strikes again.

A soon-to-be bride is caught in the middle of a twisted murder plot that has detectives questioning if she played a role in it.

The investigation into a businessman's murder leads to an arrest, but as friends and neighbors rally around the accused, it begins to look like they have the wrong man.

A 64-year-old man is charged with murder after shooting two unarmed teenagers who broke into his home.

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.

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

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

As detectives struggle to find leads in the murder of a college student, the perpetrator strikes again.

A soon-to-be bride is caught in the middle of a twisted murder plot that has detectives questioning if she played a role in it.

When a mother of five is found dead in her bedroom, her family believes a crazed killer is to blame.

Detectives find a message written in blood during a murder investigation.

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

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

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.

When a soldier who just returned from Afghanistan is gunned down on the side of the road in Kentucky; detectives quickly uncover a secret that could solve the case.

An investigation of abuse allegations against one of the owners of religious reform school Circle of Hope.

When a mother of five is found dead in her bedroom, her family believes a crazed killer is to blame.

Detectives find a message written in blood during a murder investigation.

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

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

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.

When a soldier who just returned from Afghanistan is gunned down on the side of the road in Kentucky; detectives quickly uncover a secret that could solve the case.

An investigation of abuse allegations against one of the owners of religious reform school Circle of Hope.

When a mother of five is found dead in her bedroom, her family believes a crazed killer is to blame.

Detectives find a message written in blood during a murder investigation.

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

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

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.

When a soldier who just returned from Afghanistan is gunned down on the side of the road in Kentucky; detectives quickly uncover a secret that could solve the case.

An investigation of abuse allegations against one of the owners of religious reform school Circle of Hope.

A mother, who seemed to be happily married, was found dead in her backyard spa.

An Indiana mother is found asphyxiated in her basement gym.

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.

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

After a young mom is found dead on the side of a country road, 40 miles from her Knoxville home, investigators scramble to figure out how she ended up there.

The mystery of a Florida hotel owner's disappearance confounds family, friends and the detectives investigating the case.

A mother, who seemed to be happily married, was found dead in her backyard spa.

An Indiana mother is found asphyxiated in her basement gym.

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.

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

After a young mom is found dead on the side of a country road, 40 miles from her Knoxville home, investigators scramble to figure out how she ended up there.

The mystery of a Florida hotel owner's disappearance confounds family, friends and the detectives investigating the case.

A mother, who seemed to be happily married, was found dead in her backyard spa.

An Indiana mother is found asphyxiated in her basement gym.

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.

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

After a young mom is found dead on the side of a country road, 40 miles from her Knoxville home, investigators scramble to figure out how she ended up there.

The mystery of a Florida hotel owner's disappearance confounds family, friends and the detectives investigating the case.

When remains are found amid the rubble after a house fire, authorities soon discover the incident was no accident.

A tale of sex, betrayal and murder: Inside the deadly love triangle where three became a crowd.

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.

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

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 29-year-old woman goes missing.

Police investigate whether the murder of a South Florida attorney is connected to a web of fraud, betrayal and more than $1 billion in missing money.

When remains are found amid the rubble after a house fire, authorities soon discover the incident was no accident.

A tale of sex, betrayal and murder: Inside the deadly love triangle where three became a crowd.

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.

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

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 29-year-old woman goes missing.

Police investigate whether the murder of a South Florida attorney is connected to a web of fraud, betrayal and more than $1 billion in missing money.

When remains are found amid the rubble after a house fire, authorities soon discover the incident was no accident.

A tale of sex, betrayal and murder: Inside the deadly love triangle where three became a crowd.

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.

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

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 29-year-old woman goes missing.

Police investigate whether the murder of a South Florida attorney is connected to a web of fraud, betrayal and more than $1 billion in missing money.

Authorities investigate the killing of a small-town fire chief.

A foreign exchange student and soccer player's participation in a dangerous game leads to deadly consequences.

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.

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.

When a wife calls 911 to report her husband has been shot on a country road in Texas, officers rush to the scene.

When 19-year-old Anton Black dies while being taken into police custody, the community seeks justice; a yearlong "Dateline" investigation looks at the officer at the center of the case and missed warning signs.

Authorities investigate the killing of a small-town fire chief.

A foreign exchange student and soccer player's participation in a dangerous game leads to deadly consequences.

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.

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.

When a wife calls 911 to report her husband has been shot on a country road in Texas, officers rush to the scene.

When 19-year-old Anton Black dies while being taken into police custody, the community seeks justice; a yearlong "Dateline" investigation looks at the officer at the center of the case and missed warning signs.

Authorities investigate the killing of a small-town fire chief.

A foreign exchange student and soccer player's participation in a dangerous game leads to deadly consequences.

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.

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.

When a wife calls 911 to report her husband has been shot on a country road in Texas, officers rush to the scene.

When 19-year-old Anton Black dies while being taken into police custody, the community seeks justice; a yearlong "Dateline" investigation looks at the officer at the center of the case and missed warning signs.

A brilliant woman who rose from poverty and became a successful criminal defense attorney is murdered; investigators look into her clients and follow a bizarre string of clues.

When a Chicago woman from a big family goes missing, investigators begin to suspect a man in her life is full of secrets.

Lester Holt reports on the mysterious 2005 disappearance of Ray Gricar, a district attorney in Pennsylvania who investigated sex-abuse claims made against Jerry Sandusky in 1998.

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.

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

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.

As actress Aasha Davis' career takes off, her sister and brother-in-law go missing.

A brilliant woman who rose from poverty and became a successful criminal defense attorney is murdered; investigators look into her clients and follow a bizarre string of clues.

When a Chicago woman from a big family goes missing, investigators begin to suspect a man in her life is full of secrets.

Lester Holt reports on the mysterious 2005 disappearance of Ray Gricar, a district attorney in Pennsylvania who investigated sex-abuse claims made against Jerry Sandusky in 1998.

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.

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

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.

As actress Aasha Davis' career takes off, her sister and brother-in-law go missing.

A brilliant woman who rose from poverty and became a successful criminal defense attorney is murdered; investigators look into her clients and follow a bizarre string of clues.

When a Chicago woman from a big family goes missing, investigators begin to suspect a man in her life is full of secrets.

Lester Holt reports on the mysterious 2005 disappearance of Ray Gricar, a district attorney in Pennsylvania who investigated sex-abuse claims made against Jerry Sandusky in 1998.

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.

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

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.

As actress Aasha Davis' career takes off, her sister and brother-in-law go missing.

The investigation into a newlywed's disappearance focuses on her job as a CIA employee as a possible clue.

Pamela Smart's husband is found murdered; police investigate and discover that Smart is keeping a big secret.

When young mother and paramedic Annamarie Cochrane Rintala is found dead at the bottom of her basement stairs, it takes four trials and 13 years before justice is served.

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.

Two young girls in Washington are snatched in broad daylight while riding their bikes; the case goes unsolved for decades, until a new detective with a local connection to the story tries to solve the mystery.

The investigation into a newlywed's disappearance focuses on her job as a CIA employee as a possible clue.

Pamela Smart's husband is found murdered; police investigate and discover that Smart is keeping a big secret.

When young mother and paramedic Annamarie Cochrane Rintala is found dead at the bottom of her basement stairs, it takes four trials and 13 years before justice is served.

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.

Two young girls in Washington are snatched in broad daylight while riding their bikes; the case goes unsolved for decades, until a new detective with a local connection to the story tries to solve the mystery.

The investigation into a newlywed's disappearance focuses on her job as a CIA employee as a possible clue.

Pamela Smart's husband is found murdered; police investigate and discover that Smart is keeping a big secret.

When young mother and paramedic Annamarie Cochrane Rintala is found dead at the bottom of her basement stairs, it takes four trials and 13 years before justice is served.

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.

Two young girls in Washington are snatched in broad daylight while riding their bikes; the case goes unsolved for decades, until a new detective with a local connection to the story tries to solve the mystery.

A father is accused of stealing money from his children's trust funds and murdering his ex-wife to cover up his crimes.

A man charged with murder claims he was too fat to have committed the crime.

The residents of a glamorous resort town are shocked when a well-known woman from a prominent family is found dead in her home.

When two women call 911 after hearing someone break into their apartment, their call for help holds the key to solving the mysterious murder of a young graduate student named Katie Sepich.

A 40-year-old Minnesota woman is shot to death in her bed while her husband and teenage daughter are home, leaving investigators to wonder who would want her dead.

A car belonging to a missing man erupts in a blaze, leading to clues regarding his whereabouts.

Recently uncovered pages from John Hinckley Jr.'s diary, which he began writing after he was arrested for trying to assassinate President Ronald Reagan; an interview with the officer who questioned Hinckley after the attempted assassination.

A father is accused of stealing money from his children's trust funds and murdering his ex-wife to cover up his crimes.

A man charged with murder claims he was too fat to have committed the crime.

The residents of a glamorous resort town are shocked when a well-known woman from a prominent family is found dead in her home.

When two women call 911 after hearing someone break into their apartment, their call for help holds the key to solving the mysterious murder of a young graduate student named Katie Sepich.

A 40-year-old Minnesota woman is shot to death in her bed while her husband and teenage daughter are home, leaving investigators to wonder who would want her dead.

A car belonging to a missing man erupts in a blaze, leading to clues regarding his whereabouts.

Recently uncovered pages from John Hinckley Jr.'s diary, which he began writing after he was arrested for trying to assassinate President Ronald Reagan; an interview with the officer who questioned Hinckley after the attempted assassination.

A father is accused of stealing money from his children's trust funds and murdering his ex-wife to cover up his crimes.

A man charged with murder claims he was too fat to have committed the crime.

The residents of a glamorous resort town are shocked when a well-known woman from a prominent family is found dead in her home.

When two women call 911 after hearing someone break into their apartment, their call for help holds the key to solving the mysterious murder of a young graduate student named Katie Sepich.

A 40-year-old Minnesota woman is shot to death in her bed while her husband and teenage daughter are home, leaving investigators to wonder who would want her dead.

A car belonging to a missing man erupts in a blaze, leading to clues regarding his whereabouts.

Recently uncovered pages from John Hinckley Jr.'s diary, which he began writing after he was arrested for trying to assassinate President Ronald Reagan; an interview with the officer who questioned Hinckley after the attempted assassination.

Investigators try to piece together events that led to a woman being found on the side of the road covered in blood and severely brain damaged.

After a young father is found dead in his home in Jonesboro, Ark., the authorities search for the killer.

A man from Iowa is shot to death while sleeping in bed next to his fiancee; coincidences and quick thinking lead to surprising information regarding the killer's motive.

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.

After following the case for more than fifteen years, Dateline delivers a comprehensive report with rarely-seen interrogation video, new insight from prosecutors, and surprising details from the other woman, Amber Frey, who helped uncover the truth.

When a woman is found murdered in her bed, her husband and her son accuse each other of being the killer.

A microscopic clue and a stroke of luck help authorities solve the murder of a young woman that took place inside her Jacksonville Beach, Fla., home.

Investigators try to piece together events that led to a woman being found on the side of the road covered in blood and severely brain damaged.

After a young father is found dead in his home in Jonesboro, Ark., the authorities search for the killer.

A man from Iowa is shot to death while sleeping in bed next to his fiancee; coincidences and quick thinking lead to surprising information regarding the killer's motive.

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.

After following the case for more than fifteen years, Dateline delivers a comprehensive report with rarely-seen interrogation video, new insight from prosecutors, and surprising details from the other woman, Amber Frey, who helped uncover the truth.

When a woman is found murdered in her bed, her husband and her son accuse each other of being the killer.

A microscopic clue and a stroke of luck help authorities solve the murder of a young woman that took place inside her Jacksonville Beach, Fla., home.

Investigators try to piece together events that led to a woman being found on the side of the road covered in blood and severely brain damaged.

After a young father is found dead in his home in Jonesboro, Ark., the authorities search for the killer.

A man from Iowa is shot to death while sleeping in bed next to his fiancee; coincidences and quick thinking lead to surprising information regarding the killer's motive.

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.

After following the case for more than fifteen years, Dateline delivers a comprehensive report with rarely-seen interrogation video, new insight from prosecutors, and surprising details from the other woman, Amber Frey, who helped uncover the truth.

When a woman is found murdered in her bed, her husband and her son accuse each other of being the killer.

A microscopic clue and a stroke of luck help authorities solve the murder of a young woman that took place inside her Jacksonville Beach, Fla., home.

Investigators try to piece together events that led to a woman being found on the side of the road covered in blood and severely brain damaged.

A woman seeks justice for her 18-year-old daughter, who was raped and murdered in an Anchorage state park in 1994.

A young woman is found dead in an empty warehouse parking lot in Miami -- just four days after her wedding.

When a young woman is found dead in a field on the outskirts of Green Bay, Wis., a fitness tracker helps detectives solve the mystery.

A woman is found murdered after her close friend hears her screaming on the phone; the mysterious death of her boyfriend's twin brother leads investigators to a suspect.

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.

When a woman's remains are found miles from her home, investigators start digging into her past.

An in-depth look at the journalists who exposed the dangers of cult leader Reverend Jim Jones; interviews with witnesses to murders carried out by Jones' followers.

A woman seeks justice for her 18-year-old daughter, who was raped and murdered in an Anchorage state park in 1994.