Killing Grounds: The Gilgo Beach MurdersMiniseriesSeason 1 · 2026 · 4 episodesEpisodes1Part OneWhile searching for a missing woman on Long Island, police uncover a hidden burial ground. As families demand answers, investigators begin to realize a serial killer may have been operating unnoticed for years.2Part TwoAfter years of stalled leads and system failures, a new task force reopens the Gilgo case, unearthing phone records, witness accounts, and vehicle clues that all point to a suspect who's been hiding in plain sight.3Part ThreeA year of surveillance and clandestine DNA sampling leads to Rex Heuermann's arrest. As investigators dig deeper, other victims are connected as terrifying new evidence is revealed.4Part FourA disturbing document recovered from Rex Heuermann's computer reveals what looks like a detailed murder plan. Investigators add victims and trace links far beyond Long Island. Ahead of the trial, a court ruling reveals the path forward for the case.