William Peter Blatty’s 1971 novel The Exorcist—later adapted into the 1973 William Friedkin film of the same name—was inspired by the story of Roland Doe. Blatty had heard about Doe—who’d evidently undergone several exorcisms—from one of his professors at Georgetown University. In 1949, the 14-year-old Doe claimed to have heard knocking and scratching sounds coming […]