Mystery DNA. Two relentless detectives. A shocking takedown. Friday on an all-new Dateline at 9/8c on NBC. | Dateline NBC

On this week’s Dateline: True Crime Weekly, Blayne Alexander takes us to Florida for some updates in cases we’ve been following for years. Listen now, for free, wherever you get your podcasts. | Dateline NBC

A nice little neighborhood. A beautiful spring day. And Leslie Preer... dead. Tonight at 9/8c, on an all-new Dateline with Blayne Alexander. | Dateline NBC

Something evil made its way into the Preers’ peaceful neighborhood that morning. But what? Watch it all unfold tonight on an all-new 2-hour Dateline on NBC at 9/8c. | Dateline NBC