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Rocky Mountain National Park rangers question whether a woman's fatal fall was an accident or the result of an act of violence.

A respected couple's murder leaves police puzzled and a blood-stained card at the scene is looked at again in the hopes it will yield new clues.

When a mother disappears, the internet is still in its infancy; decades later, a cold case investigator wonders if Facebook could be used to help find out what happened to the woman who vanished so long ago.

Two Tulsa brothers fight for more than 20 years to prove their innocence after they were wrongfully convicted for separate murders.