Billy Milligan

William Stanley Milligan was an American citizen who was the subject of a highly publicized court case in Ohio in the late 1970s. After having committed several felonies including armed robbery, he was arrested for three rapes on the campus of Ohio State University. In the course of preparing his defense, psychologists diagnosed Milligan with multiple personality disorder. His lawyers plead insanity, claiming that two of his alternate personalities committed the crimes without Milligan being aware of it. He was the first person diagnosed with dissociative identity disorder to raise such a defense, and the first acquitted of a major crime for this reason, instead spending a decade in mental hospitals.