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A former ballerina shoots her husband in what she alleges was an act of self-defense; the ensuing investigation and dramatic trial spark protests and receives national attention.

A son uncovers a dark family conspiracy when he questions his mother following a man's apparent suicide.

When a complicated Texas love triangle ends in murder, a pink gun leads to an arrest, until new evidence prompts investigators to rethink the case.

When a determined investigator works with a prosecutor in hope of solving a 20-year-old murder case, a dark secret is uncovered.

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

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

Firefighters make a grisly discovery while responding to a house fire in a Toronto suburb; as a family searches for answers, investigators launch an elaborate undercover sting that reveals a devious murder-for-hire plot and the ultimate betrayal.

A woman and her dogs disappear from their home.

Years after a Montana man is found dead, his son opens up a box of case files to find out what really happened.

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.

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

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

A doctor ingests a lethal chemical, causing friends to wonder if it was an attempt at suicide or if he was poisoned -- until a love triangle is uncovered.

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.

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

When a young woman is found nearly murdered in her apartment, officials wonder if it is connected to the disappearance of a young woman in nearby Denver weeks earlier.

A Jacksonville, Fla., firefighter discovers a disturbingly violent scene in his darkened bedroom on a Halloween weekend.

As a murder victim's sisters dedicate themselves to finding the killer, an unexpected source turns the case upside down.

The security cameras at the home of a wife and mother of three's home may hold the key to solving the mystery of her disappearance.

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

When police investigate the shooting death of a man who was in bed with his wife, they discover a complex case with two suspects.

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.