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 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.

The FBI gets involved when a Virginia man's wife and son are kidnapped while vacationing in the Philippines, with a terrorist group demanding millions in ransom.

Josh Mankiewicz reports on the mysterious disappearance of a Colorado rancher, whose friends think something isn't right and spend years fighting for answers.

Computer antivirus pioneer John McAfee -- who remains a person of interest in a murder investigation -- discusses his new business and why he decided to stop running from the law.

A matriarch's death leads to a prominent family from Texas being torn apart by decades of betrayal, greed and mistrust.

The investigation into the death of a pregnant woman just months after she wed her high school sweetheart reveals secret lives and feuds.

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.

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 a San Diego woman who is near death arrives at an emergency room, the FBI and local law enforcement are called in to try to solve a medical mystery and a horrific crime.

When detectives track down the killer of a Las Vegas cocktail waitress and mother, it becomes clear that the investigation has just begun.

Computer antivirus pioneer John McAfee -- who remains a person of interest in a murder investigation -- discusses his new business and why he decided to stop running from the law.

A matriarch's death leads to a prominent family from Texas being torn apart by decades of betrayal, greed and mistrust.

The investigation into the death of a pregnant woman just months after she wed her high school sweetheart reveals secret lives and feuds.

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.

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 a San Diego woman who is near death arrives at an emergency room, the FBI and local law enforcement are called in to try to solve a medical mystery and a horrific crime.

When detectives track down the killer of a Las Vegas cocktail waitress and mother, it becomes clear that the investigation has just begun.

Computer antivirus pioneer John McAfee -- who remains a person of interest in a murder investigation -- discusses his new business and why he decided to stop running from the law.

A matriarch's death leads to a prominent family from Texas being torn apart by decades of betrayal, greed and mistrust.

The investigation into the death of a pregnant woman just months after she wed her high school sweetheart reveals secret lives and feuds.

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.

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 a San Diego woman who is near death arrives at an emergency room, the FBI and local law enforcement are called in to try to solve a medical mystery and a horrific crime.

When detectives track down the killer of a Las Vegas cocktail waitress and mother, it becomes clear that the investigation has just begun.

Investigating the murder of a brilliant professor.

A woman's story about an abduction and murder helps reopen a decades-old case that has weighed heavy on a New York town.

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

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 college student is found murdered in a residential neighborhood; as police search for the truth, they are stunned to learn that one of their own might be involved.

A Philadelphia murder reveals decades of misconduct in the city's criminal justice system and raises questions aout whether police caught the right person; key insiders in the case speak out for the first time on national television.

A mystery in paradise unfolds when Sarm Heslop vanishes from her boyfriend's luxury yacht in the U.S. Virgin Islands; new details emerge on the case that made international headlines and left investigators with more questions than answers.

Investigating the murder of a brilliant professor.

A woman's story about an abduction and murder helps reopen a decades-old case that has weighed heavy on a New York town.

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

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 college student is found murdered in a residential neighborhood; as police search for the truth, they are stunned to learn that one of their own might be involved.

A Philadelphia murder reveals decades of misconduct in the city's criminal justice system and raises questions aout whether police caught the right person; key insiders in the case speak out for the first time on national television.

A mystery in paradise unfolds when Sarm Heslop vanishes from her boyfriend's luxury yacht in the U.S. Virgin Islands; new details emerge on the case that made international headlines and left investigators with more questions than answers.

Investigating the murder of a brilliant professor.

A woman's story about an abduction and murder helps reopen a decades-old case that has weighed heavy on a New York town.

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

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 college student is found murdered in a residential neighborhood; as police search for the truth, they are stunned to learn that one of their own might be involved.

A Philadelphia murder reveals decades of misconduct in the city's criminal justice system and raises questions aout whether police caught the right person; key insiders in the case speak out for the first time on national television.

A mystery in paradise unfolds when Sarm Heslop vanishes from her boyfriend's luxury yacht in the U.S. Virgin Islands; new details emerge on the case that made international headlines and left investigators with more questions than answers.

A community is left in shock when a Cornell student and star athlete gets caught in the middle of a homicide investigation.

The investigation into the death of a Florida firefighter reveals a tale of secrets, lies and infidelity.

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 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.

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

When a University of Utah athlete is found murdered on campus, investigators learn that she had reached out to the campus police for help multiple times before her death.

When a young woman finds out that her boyfriend might have shot and killed a college football player out of revenge, she struggles with coming forward to officials, fearing she could lose her life.

A community is left in shock when a Cornell student and star athlete gets caught in the middle of a homicide investigation.

The investigation into the death of a Florida firefighter reveals a tale of secrets, lies and infidelity.

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 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.

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

When a University of Utah athlete is found murdered on campus, investigators learn that she had reached out to the campus police for help multiple times before her death.

When a young woman finds out that her boyfriend might have shot and killed a college football player out of revenge, she struggles with coming forward to officials, fearing she could lose her life.

A community is left in shock when a Cornell student and star athlete gets caught in the middle of a homicide investigation.

The investigation into the death of a Florida firefighter reveals a tale of secrets, lies and infidelity.

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 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.

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

When a University of Utah athlete is found murdered on campus, investigators learn that she had reached out to the campus police for help multiple times before her death.

When a young woman finds out that her boyfriend might have shot and killed a college football player out of revenge, she struggles with coming forward to officials, fearing she could lose her life.

A community is left in shock when a Cornell student and star athlete gets caught in the middle of a homicide investigation.

Identical twins find their mother's dead body in their home, located in a gated community; detectives uncover a hidden diary and clues buried in the victim's past.

When police find a prominent lawyer dead and his girlfriend bound in duct tape, their investigation leads to a surprising suspect.

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

A couple is murdered shortly after their wedding and police suspect a family feud is the cause; Josh Mankiewicz looks back at what started the dispute that left him floored.

After a 15-year-old girl disappears, investigators discover a creek where the local teenagers hang out that may hold the answer to her disappearance.

A professional poker player's gamble may have resulted in a murder.

When a young mother disappears after leaving her infant in the care of her local pastor and his wife, Florida detectives search for her for five years, uncovering a web of secrets and lies.

Identical twins find their mother's dead body in their home, located in a gated community; detectives uncover a hidden diary and clues buried in the victim's past.

When police find a prominent lawyer dead and his girlfriend bound in duct tape, their investigation leads to a surprising suspect.

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

A couple is murdered shortly after their wedding and police suspect a family feud is the cause; Josh Mankiewicz looks back at what started the dispute that left him floored.

After a 15-year-old girl disappears, investigators discover a creek where the local teenagers hang out that may hold the answer to her disappearance.

After Tahereh Ghassemi disappears from the Louisiana home she shares with her adult son, detectives discover that she'd recently come into a great deal of money; the investigation reveals an astonishing plot with international implications.

When a young mother disappears after leaving her infant in the care of her local pastor and his wife, Florida detectives search for her for five years, uncovering a web of secrets and lies.

Identical twins find their mother's dead body in their home, located in a gated community; detectives uncover a hidden diary and clues buried in the victim's past.

When police find a prominent lawyer dead and his girlfriend bound in duct tape, their investigation leads to a surprising suspect.

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

A couple is murdered shortly after their wedding and police suspect a family feud is the cause; Josh Mankiewicz looks back at what started the dispute that left him floored.

After a 15-year-old girl disappears, investigators discover a creek where the local teenagers hang out that may hold the answer to her disappearance.

After Tahereh Ghassemi disappears from the Louisiana home she shares with her adult son, detectives discover that she'd recently come into a great deal of money; the investigation reveals an astonishing plot with international implications.

When a young mother disappears after leaving her infant in the care of her local pastor and his wife, Florida detectives search for her for five years, uncovering a web of secrets and lies.

The life of the charming con man who went by the name Clark Rockefeller.

A woman seeks the truth when her whirlwind romance turns into a mystery with government agents, cryptic messages and international spies.

A look at the case of con man John Meehan, including interviews with his wife and her daughter, his ex-wife, law enforcement officers, and the Los Angeles Times reporter who shined a spotlight on the story.

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

When a graduate student is shot dead outside of her North Carolina home, a 911 caller leads detectives to believe the victim's fiance is the key to solving the case.

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.

Michelle Hadley is exonerated after spending three months in jail for attempted forcible rape of her ex-fiance's wife.

The life of the charming con man who went by the name Clark Rockefeller.

A woman seeks the truth when her whirlwind romance turns into a mystery with government agents, cryptic messages and international spies.

A look at the case of con man John Meehan, including interviews with his wife and her daughter, his ex-wife, law enforcement officers, and the Los Angeles Times reporter who shined a spotlight on the story.

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

When a graduate student is shot dead outside of her North Carolina home, a 911 caller leads detectives to believe the victim's fiance is the key to solving the case.

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.

Michelle Hadley is exonerated after spending three months in jail for attempted forcible rape of her ex-fiance's wife.

The life of the charming con man who went by the name Clark Rockefeller.

A woman seeks the truth when her whirlwind romance turns into a mystery with government agents, cryptic messages and international spies.

A look at the case of con man John Meehan, including interviews with his wife and her daughter, his ex-wife, law enforcement officers, and the Los Angeles Times reporter who shined a spotlight on the story.

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

When a graduate student is shot dead outside of her North Carolina home, a 911 caller leads detectives to believe the victim's fiance is the key to solving the case.

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.

Michelle Hadley is exonerated after spending three months in jail for attempted forcible rape of her ex-fiance's wife.

After Tahereh Ghassemi disappears from the Louisiana home she shares with her adult son, detectives discover that she'd recently come into a great deal of money; the investigation reveals an astonishing plot with international implications.

The 2006 poisoning death of former Russian spy and businessman Alexander Litvinenko; an interview with the prime suspect in the case.

The homicide of private first class soldier and young mother Karlyn Ramirez; a glimpse into the FBI's crime lab and an in-depth look at how multiple agencies uncovered a plot that spanned several states and prompted suspicions of espionage.

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

A love triangle leads to years of stalking, property destruction, threats, and murder.

A Connecticut bank executive is targeted by criminals who force him to rob his own bank.

When one woman breaks off her relationship with a boyfriend she says abused and stalked her, he moves on to something even worse.

A professional poker player's gamble may have resulted in a murder.

The 2006 poisoning death of former Russian spy and businessman Alexander Litvinenko; an interview with the prime suspect in the case.

The homicide of private first class soldier and young mother Karlyn Ramirez; a glimpse into the FBI's crime lab and an in-depth look at how multiple agencies uncovered a plot that spanned several states and prompted suspicions of espionage.

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

A love triangle leads to years of stalking, property destruction, threats, and murder.

A Connecticut bank executive is targeted by criminals who force him to rob his own bank.

When one woman breaks off her relationship with a boyfriend she says abused and stalked her, he moves on to something even worse.

A professional poker player's gamble may have resulted in a murder.

The 2006 poisoning death of former Russian spy and businessman Alexander Litvinenko; an interview with the prime suspect in the case.

The homicide of private first class soldier and young mother Karlyn Ramirez; a glimpse into the FBI's crime lab and an in-depth look at how multiple agencies uncovered a plot that spanned several states and prompted suspicions of espionage.

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

A love triangle leads to years of stalking, property destruction, threats, and murder.

A Connecticut bank executive is targeted by criminals who force him to rob his own bank.

When one woman breaks off her relationship with a boyfriend she says abused and stalked her, he moves on to something even worse.

Investigating the mysterious murder of a family patriarch.

A woman accused of attempting to hire a hit man to kill her husband.

When a woman returns two days after being reported abducted, authorities believe it's a hoax until a similar crime forces them to take another look; twenty-seven women who have accused Bill Cosby of assault get together to share their stories.

Police link a filmmaker who is obsessed with the show "Dexter" with a man's disappearance.

A mother of two mysteriously vanishes from her parents' Michigan home while going to check the mailbox, leaving her phone and identification behind; police declare her dead without discovering a body.

A man steals millions of dollars by conning numerous women and businesses over 25 years; one woman brings together a group of his victims to hold him accountable and make him face justice.

A mother's death initially appears to be a suicide, but when investigators start to interview those closest to her, an evil plot emerges.

Investigating the mysterious murder of a family patriarch.

A woman accused of attempting to hire a hit man to kill her husband.

When a woman returns two days after being reported abducted, authorities believe it's a hoax until a similar crime forces them to take another look; twenty-seven women who have accused Bill Cosby of assault get together to share their stories.

Police link a filmmaker who is obsessed with the show "Dexter" with a man's disappearance.

A mother of two mysteriously vanishes from her parents' Michigan home while going to check the mailbox, leaving her phone and identification behind; police declare her dead without discovering a body.

A man steals millions of dollars by conning numerous women and businesses over 25 years; one woman brings together a group of his victims to hold him accountable and make him face justice.

A mother's death initially appears to be a suicide, but when investigators start to interview those closest to her, an evil plot emerges.

Investigating the mysterious murder of a family patriarch.

A woman accused of attempting to hire a hit man to kill her husband.

When a woman returns two days after being reported abducted, authorities believe it's a hoax until a similar crime forces them to take another look; twenty-seven women who have accused Bill Cosby of assault get together to share their stories.

Police link a filmmaker who is obsessed with the show "Dexter" with a man's disappearance.

A mother of two mysteriously vanishes from her parents' Michigan home while going to check the mailbox, leaving her phone and identification behind; police declare her dead without discovering a body.

A man steals millions of dollars by conning numerous women and businesses over 25 years; one woman brings together a group of his victims to hold him accountable and make him face justice.

A mother's death initially appears to be a suicide, but when investigators start to interview those closest to her, an evil plot emerges.

On a family hunting trip in Newfoundland, a man is shot to death.

Police doubt an Ohio doctor's story about events leading to his wife's death.

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

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

New insights into the real story of the very private royal, including a look at Diana's troubled marriage, her turbulent life in the royal family and the investigation into her death.

A daughter finds her father, a former FBI agent, murdered at his house; police dig into the man's past and begin to think the key to the mystery might be quite close to home.

When police are unable to identify a young murder victim, a dogged investigator employs the help of armchair detectives and new DNA technology to find her killer -- and her identity.

On a family hunting trip in Newfoundland, a man is shot to death.

Police doubt an Ohio doctor's story about events leading to his wife's death.

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

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

New insights into the real story of the very private royal, including a look at Diana's troubled marriage, her turbulent life in the royal family and the investigation into her death.

A daughter finds her father, a former FBI agent, murdered at his house; police dig into the man's past and begin to think the key to the mystery might be quite close to home.

When police are unable to identify a young murder victim, a dogged investigator employs the help of armchair detectives and new DNA technology to find her killer -- and her identity.

On a family hunting trip in Newfoundland, a man is shot to death.

Police doubt an Ohio doctor's story about events leading to his wife's death.

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

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

New insights into the real story of the very private royal, including a look at Diana's troubled marriage, her turbulent life in the royal family and the investigation into her death.

A daughter finds her father, a former FBI agent, murdered at his house; police dig into the man's past and begin to think the key to the mystery might be quite close to home.

When police are unable to identify a young murder victim, a dogged investigator employs the help of armchair detectives and new DNA technology to find her killer -- and her identity.

When a scientist is murdered in his home, detectives try to figure out why his wife and son were left unharmed.

Detectives suspect an inside job when a coin collector and his wife are found dead in their home with no sign of forced entry or evidence of theft.

The mystery of a successful real estate entrepreneur killed by a car bomb spans nearly two decades.

When an Iowa woman is attacked while home alone with her three children, the confrontation turns deadly.

When Cara Ryan shoots her ex-husband and accuses him of threatening to kill her, police question her motive.

Former DEA agent Andrew Hogan details his search for Mexican drug lord Joaquín "El Chapo" Guzmán with never-before-seen videos and photographs.

When the mysterious death of a 23-year-old mother in New Mexico goes unsolved, her family searches for answers.

When a scientist is murdered in his home, detectives try to figure out why his wife and son were left unharmed.

Detectives suspect an inside job when a coin collector and his wife are found dead in their home with no sign of forced entry or evidence of theft.

The mystery of a successful real estate entrepreneur killed by a car bomb spans nearly two decades.

When an Iowa woman is attacked while home alone with her three children, the confrontation turns deadly.

When Cara Ryan shoots her ex-husband and accuses him of threatening to kill her, police question her motive.

Former DEA agent Andrew Hogan details his search for Mexican drug lord Joaquín "El Chapo" Guzmán with never-before-seen videos and photographs.

When the mysterious death of a 23-year-old mother in New Mexico goes unsolved, her family searches for answers.

When a scientist is murdered in his home, detectives try to figure out why his wife and son were left unharmed.

Detectives suspect an inside job when a coin collector and his wife are found dead in their home with no sign of forced entry or evidence of theft.

The mystery of a successful real estate entrepreneur killed by a car bomb spans nearly two decades.

When an Iowa woman is attacked while home alone with her three children, the confrontation turns deadly.

When Cara Ryan shoots her ex-husband and accuses him of threatening to kill her, police question her motive.

Former DEA agent Andrew Hogan details his search for Mexican drug lord Joaquín "El Chapo" Guzmán with never-before-seen videos and photographs.

When the mysterious death of a 23-year-old mother in New Mexico goes unsolved, her family searches for answers.

A girl's recovery from a gunshot wound inspires the community to get her justice.

Halloween becomes tragic for a young woman when her fiance is killed at a local bar.

When a young, handsome veterinarian is found dead in his home in Montana, the mystery remains unsolved for nearly two decades.

As Hurricane Charley ravages a small town in Florida, a man trying to avoid his past hides out in a hotel room.

Insiders close to an Idaho woman accused of murdering her husband speak out for the first time on television; new details emerge, including never-before-seen bodycam and jailhouse footage.

When a Kansas prisoner escapes with the help of a prison volunteer and mother of two, investigators scramble to track the pair down.

A 21-year-old college student is found murdered; the case remains cold for nearly 40 years until a new detective uses an innovative method to catch her killer.

A girl's recovery from a gunshot wound inspires the community to get her justice.

Halloween becomes tragic for a young woman when her fiance is killed at a local bar.

When a young, handsome veterinarian is found dead in his home in Montana, the mystery remains unsolved for nearly two decades.

As Hurricane Charley ravages a small town in Florida, a man trying to avoid his past hides out in a hotel room.

Insiders close to an Idaho woman accused of murdering her husband speak out for the first time on television; new details emerge, including never-before-seen bodycam and jailhouse footage.

When a Kansas prisoner escapes with the help of a prison volunteer and mother of two, investigators scramble to track the pair down.

A 21-year-old college student is found murdered; the case remains cold for nearly 40 years until a new detective uses an innovative method to catch her killer.