In this episode, a family claims a family member has become possessed by a demon. When a young man challenges the demon in an attempt to save his friend, he may have gotten more than he bargained for. He would later claim that demons drove him to commit a brutal murder.
Resources:
“By Demons Possessed” by Lynn Darling for The Washington Post, September 13, 1981.https://www.washingtonpost.com/archive/lifestyle/1981/09/13/by-demons-possessed/3479fa6b-eee3-4233-a2fc-b9defa403504/

“The Murder That Inspired The Conjuring III” by Josie Klakstrom for Medium.com, June 8, 2021. https://medium.com/the-true-crime-edition/arne-johnson-the-devil-made-me-do-it-cf6ff04f611a