Aaron plays everyone, even the audience, like a fiddle in the movie Primal Fear. Pretending to be a helpless, innocent choir boy, he gradually reveals he has multiple personalities. One of his personalities (Roy) is much more violent and angry. Throughout the movie, Martin Vail, Aaron/Roy’s lawyer, tries to prove Roy is insane, and it works like magic for Roy. In the end, Vail realizes Roy was just putting on an elaborate show to get his desired outcome.