Billy was born on 14 February 1955 in Ohio, America. At the 25 he was arrested for three rapes on the campus of Ohio State University. during a court trial, he caught the attention of world media when his lawyer gives a statement that sooks the word. billy's lawyer stated that he has multiple personality disorders 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.
Milligan was sent to send to several mental hospitals for treatment. At the initial stage of his treatment, he reported having ten personalities. Later on, an additional 14 personalities, labeled "The Undesirables", were discovered.
Some of his personalities-
Arthur- A prim and proper Englishman who was an expert in science, medicine, and hematology;
Allen- a manipulator;
Tommy- an escape artist and technophile;
Ragen Vadascovinich- a Yugoslav communist who Milligan claimed had committed the robberies in a kind of Robin Hood spirit;
Adalana- a 19-year-old lesbian(shy, lonely, and introverted) who cooked for all the personalities and craved affection and who had allegedly committed the rapes, and so on.
Milligan received treatment from psychiatrist David Caul, who diagnosed the additional fourteen personalities.
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