“It was horrible. Worst thing I've ever seen.” The full story, tonight on an all-new 2-hour Dateline mystery at 9/8c on NBC. | Dateline NBC

“He said, ‘Well, you’ll know what to tell Dateline if I die mysteriously.’” Curious… The full story airs Friday at 9/8c on an all-new 2-hour episode with Keith Morrison. | Dateline NBC

This was murder. No question. But who was the victim? And who killed him? And why? The full story tonight at 9/8c on a Dateline Weekend Mystery. | Dateline NBC

A killer was on the loose… The full story tonight at 9/8c on a Dateline Weekend Mystery on NBC. | Dateline NBC

Gelareh was the center of attention, in the best sort of way. More details tonight on an all-new 2-hour Dateline at 9/8c. | Dateline NBC

Two murders. Three Trials. One killer. Watch it all unfold tonight at 9/8c on an ALL-NEW Dateline mystery… | Dateline NBC

Investigators walked into a mystery that would turn their world upside down… Watch tonight at 9/8c on a 2-hour Dateline Weekend Mystery on NBC. | Dateline NBC

Tonight on a new Dateline, the latest chapter in this hair-raising tale, featuring new evidence, explosive testimony and the prosecution's new star witness. Watch at 9/8c on NBC. | Dateline NBC