Movies That Were ‘Based On A True Story’, But Apparently, That Was A Lie
The Haunting In Connecticut

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Based on a book claiming to be fact, The Haunting in Connecticut followed the Campbells. The real-life family who moved into a haunted house. The former mortuary helped mix up the usual jump scare while the movie played with the truth.
After The Haunting in Connecticut came out, author Roy Garton admitted the book he wrote was fiction. When he interviewed the homeowners, they advised him to make up everything up.