Ed Warren and Lorraine Warren, who are known for involvement in The Amityville Horror case, were investigators for this case.
Author Ray Garton, who wrote In A Dark Place, has distanced himself from the claims of the Snedecker family and the Warrens. He has continually disowned the book, proclaiming it to be 100% fiction.
The movie is loosely based on the real life stories of Al and Carmen Snedeker who lived in a reportedly haunted former funeral parlor in Southington, Connecticut.
The story was first featured in the novel "In A Dark Place: The Story of a True Haunting" written by Ray Garton.