“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

It was a case that touched generations of investigators, who refused to quit until the killer was found… And we'll tell you all about it on a Dateline Weekend Mystery tonight at 9/8c. | Dateline NBC

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