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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 an Ohio resident is offered $50,000 to kill someone hundreds of miles away, investigators set up an elaborate sting operation to bring down those behind the murder-for-hire plot.

A man convicted of murdering a woman in her upscale Austin, Texas, home tells his story for the first time.

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.

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

A college student goes missing in broad daylight from her off-campus job at a softball field; investigators receive a mysterious phone call that changes everything.

An Idaho woman's affair with her married boss leads to a lethal confrontation.

Investigators try to determine what caused a house fire that killed the 41-year-old wife of a paramedic.

With no arrest having been made years after a real estate agent's murder, frustration continues to mount among her family and friends.

A man convicted of murdering a woman in her upscale Austin, Texas, home tells his story for the first time.

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

A college student goes missing in broad daylight from her off-campus job at a softball field; investigators receive a mysterious phone call that changes everything.

An Idaho woman's affair with her married boss leads to a lethal confrontation.

Investigators try to determine what caused a house fire that killed the 41-year-old wife of a paramedic.

With no arrest having been made years after a real estate agent's murder, frustration continues to mount among her family and friends.

When a woman disappears after an encounter on a train, her family hires detectives to investigate.

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

Michael Peterson, who was granted a new trial after the 2003 conviction in the murder of his wife was overturned, discusses the case and his decision to enter an Alford plea.

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

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.

Ohio investigators search for answers in the decades-old murder of 10-year-old Amy Mihaljevic; a retracing of Amy's steps from the day of the kidnapping.

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