New episode of the explosive documentary about the Gilgo Beach Killer has premiered. The fourth episode, which includes exclusive access to the Heuermann family, reveals that the murders were all in their home, with ex-wife Asa Ellerup stating that when asked if the murders occurred, he replied "yes." The final episode details the real-time questioning of Asa to her serial killer ex-husband about the murder timeline and planning of the murder. The series also includes interviews with the family’s psychotherapist, author John Douglas, and FBI behavioral science unit member Rex Hueermann. As part of his plea deal, Hueemann will be working with the FBI's behavioral science team as part of the investigation.