In 2012, 64-year-old retiree Byron David Smith admitted to gunning down two teenagers who broke into his Little Falls, Minnesota, home on Thanksgiving Day. Watch Dateline: The Smoking Gun on Oxygen ...

Learn more about what happened to Lance Herndon, an Atlanta millionaire businessman with "secrets" who was found bludgeoned ...

Preview: Annamarie Cochrane-Rintala is found dead in her home. Her wife, Cara Rintala, is in shambles at the discovery.

Preview: Cara Rintala's behavior during questioning makes detectives suspect that she may have had something to do with the ...

Preview: Brianna Rintala, a toddler at the time, discovers the body of her mother, Annamarie Cochrane-Rintala.

When Christian Rojas is found dead in his apartment, investigators quickly realize that there'd been a violent fight before his death.

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See what John Ramsey has to say about daughter JonBenét Ramsey's murder more than 25 years after she was found dead in the ...

A man shot and killed two teenagers breaking into his home. He said he acted in self-defense. The investigation uncovered an astonishing piece of evidence that told a different story.