From CSICOP:

Demons in Connecticut
JOE NICKELL

Shades of The Amityville Horror! Take a house reeking of death, bring in a “demonologist,” commission a professional writer to enhance the alleged events, Hollywoodize the resulting book into a horror/thriller flick, and shamelessly bandy about the word true in promotional copy. This formula lured moviegoers to The Amityville Horror (1979); now—current hucksters hope—The Haunting in Connecticut, “based on true events,” will entice a new generation of credulous screamers. But here is some of the real truth I encountered in my investigation of the case in 1992 and 1993.