This Friday, February 21, 2025, at 9:00 Pm Et/8:00 Pm Ct, Dateline NBC presents a gripping two-hour investigation into the tragic murders of teenagers Abby and Libby in Delphi, Indiana. Dateline correspondent Andrea Canning takes viewers inside one of the most high-profile cases in recent memory, where the discovery of a video taken by one of the victims played a pivotal role in solving the case.

Abby Williams, 13, and Libby German, 14, were murdered while walking on a popular trail in their small, close-knit hometown of Delphi. What made this case even more chilling was the revelation that Libby had recorded a video of the killer just before her death—an invaluable piece of evidence that ultimately helped law enforcement track down the murderer.

In this Dateline special, viewers will hear from key individuals involved in the investigation, including Delphi Sheriff Tony Liggett, Libby’s grandparents Becky and Mike Patty, and Indiana State Police Superintendent Doug Carter.