Roland Doe, the Boy Who Inspired The Exorcist
In 1949, the Washington Post published an article about a 14-year-old boy who had been cured of demon possession. William Peter Blatty, then a college student, read the article, and many years later wrote the 1971 novel...
https://www.neatorama.com/2021/12/26/Roland-Doe-the-Boy-Who-Inspired-The-Exorcist/