The Killer Next Door

In the early 1970s, serial killer Edmund Kemper had Santa Cruz, California on edge. But what drove the so-called Co-Ed Killer, to snatch, murder and dismember young women? Profiler John Douglas began a landmark serial killer study after meeting Kemper and delves into the killer's tormented past.

Fear struck rural South Carolina in June 1985 when a serial killer began phoning the family of one of his victims. Using the recorded phone calls, John Douglas reveals what drove Larry Gene Bell to taunt this family and how he helped ensure Bell was convicted for his crimes.

Gary Heidnik lured several African American women into his Philadelphia basement where he held them prisoner, tortured them in a pit and murdered two of them. But was this brutal killer of the 1980s actually insane? John Douglas reveals secret clues inside the man's twisted past.

John Wayne Gacy was the real killer clown, a nightmare manifest. He lived a life of duplicity as a respected civic leader while also killing at least 33 men and hiding them in his crawl space. Now John Douglas uses never before seen FBI interview tapes to decode how and why Gacy got away with murder for so long.

David Berkowitz, known as the Son of Sam, terrorized New York in the 1970s. This young man from Yonkers brought the city to its knees, killing seven victims and wounding 6 others, all as rumors of ties to a satanic cult emerged. John Douglas sat down with Berkowitz to separate fact from fiction.