Tonight on an all-new 2-hour Dateline mystery at 9/8c, you'll hear the inside story of a decades-long investigation... | Dateline NBC

“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

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

The mystery of what happened to Jay Lee would haunt an entire community, and reveal a most unlikely suspect… Watch tonight at 9/8c on an all-new 2-hour Dateline with Blayne Alexander. | Dateline NBC