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Brothers fight to prove their innocence after they were wrongfully convicted for separate murders.

Brothers fight to prove their innocence after they were wrongfully convicted for separate murders.

Two years after the disappearance of his wife, Josh Powell kills his two sons and himself.

Police investigate whether the shooting of a young woman in Utah was an accident.

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

When Susan Woods doesn't show up for work, she is soon discovered dead in her bathtub.

Police initially suspect natural causes as they investigate a man's death.

The investigation into the death of a woman whose remains were found in her Frisco, Texas, garage.

Brothers fight to prove their innocence after they were wrongfully convicted for separate murders.

Two years after the disappearance of his wife, Josh Powell kills his two sons and himself.

Co-lead investigator in the Steven Avery case Tom Fassbender discusses the case.

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

Questions remain in the case that gripped and divided the nation; hear new details from key players.

Park rangers question whether a fatal fall was an accident or the result of an act of violence.

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

The drug-related death of a 17-year-old girl sheds light on a new class of synthetic drugs.

Authorities investigate a car crash that left a pregnant woman and her son dead.

Co-lead investigator in the Steven Avery case Tom Fassbender discusses the case.

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

Questions remain in the case that gripped and divided the nation; hear new details from key players.

Park rangers question whether a fatal fall was an accident or the result of an act of violence.