The Crowded Room Trailer

Tom Holland portrays Danny Sullivan, a character inspired by The Campus Rapist, Billy Milligan, who became the first person diagnosed with dissociative identity disorder to go to trial and have his layers claim that his alternate personalities committed the crimes. He was also the first person acquitted of such vile crimes for that reason. Milligan was also the inspiration for James McAvoy's character Dennis in the M. Night Shyamalan movie Split.