St. Louis (KSDk) -- Many consider the 1973 film "The Exorcist" the scariest movie of all time. If the mere thought of the famous flick gives you the chills, consider this: It's directly based on a true incident that happened in St. Louis.
The real story that inspired the famous book and movie happened in 1949. It began in Maryland, ended in St. Louis, and involved several Jesuits from Saint Louis University.
Father Raymond J. Bishop, S.J. kept a day-by-day account of the exorcism. Click here to read the diary.
Pat McGonigle's stories about the SLU exorcism:
SLU expert talks about exorcism on campus
What became of the boy in the exorcism?