I was wondering if anyone knew anything truly factual about the exorcism. Every where the information is changed in someway as to dates and ages and all that. They said they didnt want her to ever find out it was her. It seems weird they would wait 50 years to make a movie about this extreme happing. And does anyone know why they chose Earling, Iowa?
He researched a few exorcisms including the Iowa exorcism which has many similarities to the more extreme elements of “The Exorcist”.
http://www.suite101.com/article.cfm/paranormal_realm/118244
The case that actually got Blatty interested on the subject was of a boy from Cottage City, Maryland (The actual exorcism was performed in St. Louis) that was reported in The Washington Post.