Here are the real events that inspired — and were inspired by — William Friedkin's horror masterpiece. Blatty first heard about the case of “Roland Doe” when he was a student at Georgetown University.
Warning: This article contains spoilers for The Exorcist. As written by William Peter Blatty, both in his original novel and his Academy Award-winning screenplay, The Exorcist (1973) did not happen.
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