Episode 2.27 // Billy Milligan

Around the same time the first Hillside Stranglers victims were found near Los Angeles, a young man was arrested in Ohio in an unrelated string of robberies and sexual assaults that would have strange bearing over the California cases. Billy Milligan -- who ultimately would be diagnosed as having dissociative identity disorder manifesting in 24 distinct personalities -- would become the first person found not guilty by reason of insanity because of a multiple-personality diagnosis.