DebRobertsABC unpacks extensive details in the Rex Heuermann case. Find out what to expect from his sentencing hearing. Plus, how the victim’s families are reacting to his surprising guilty plea. Listen to our newest episode of "20/20: The After Show,” wherever you get your podcasts. Stream 20/20 'Long Island Serial Killer' on Disney+ and Hulu (S45, E36). #AfterShow #Gilgo #Investigation #TrueCrimePodcast #RexHeuermann