crimes going to theatres - film portrayals of real crimes

We all know about Ted Bundy being real, but what else in media was based on real-life crimes? I know I said I'd talk about Arsenic and Old Lace, but another blogger already did, so I looked around at some other cases of true-crime-turned-film. Most of what I found was obvious and horror-related, but here is what I found, obvious or not. Psycho, a film that has terrified many, was based on a real-life crime, which, frankly, terrifies me. Also, the movies The Boston Strangler, American Psycho, and Halloween. Let's start with one I led with. Psycho This Alfred Hitchcock film stars Norman Bates, but it was actually based on Ed Gein. Gein was also obsessed with his own mother. Some experts have said he used women's skin to dress like his late mother. Terrified yet? Yeah, me too. In 1957 a woman named Bernice Worden went missing, and Gein was last to see her alive. The police later found her and other womens' remains in his farmhouse. This guy also exhume...