Find out why James Savage and Heather Lavelle "tortured" and killed computer programmer Christian Rojas, 28, who was found dead in his Pennsylvania bathtub.

Learn more about the tragic death of climber Geoffrey Farrar at the hands of David DiPaolo, as told in Accident, Suicide, or ...

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 ...

Richard Hanchett reveals it was “just like the movies.” ...

As the years went by, the mystique grew.” ...

Investigators looked to his family to help fill in the holes in their timeline.

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

Heather Lavelle and James Savage brutally murdered Christian Rojas, but one question remains: Why?

Maria Martino Negron speaks about learning of her father's brutal murder.

Detectives find strange letters made from magazine clippings in the wake of Alberto Martino's murder.

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 ...