The Hillside Stranglers

In 1979, police apprehend Kenneth Bianchi for the murders of two University of Washington students; his arrest shocks the world of psychiatry and sparks new life into one of America's most notorious serial killer investigations.

Ken Bianchi claims responsibility for the Hillside Strangler murders in Los Angeles, but he blames the murders on his multiple personality "Steve" and his cousin Angelo Buono; investigators must determine if he's credible or a pathological liar.

The Hillside Strangler Task Force receives a phone call from Bellingham, Wash., providing a breakthrough; prosecutors enlist psychiatrist Dr. Martin Orne to help untangle the devastating truth behind Bianchi's claims.