THE AMITYVILLE HORROR 2: THE POSSESSION (1982)
This chilling sequel (more of a prequel, really) to The Amityville Horror relates the events that led up to arrival of the Lutz family at 112 Ocean Avenue, as detailed in the first film. Soon after the Montelli family moves into the Amityville house, they notice strange occurrences, and before long the eldest son (Jack Magner) becomes possessed and kills the entire family. James Olson plays a priest determined to perform an exorcism on the boy.
James Olson, Burt Young, Rutanya Alda, Jack Magner, Andrew Prine, Diane Franklin, Moses Gunn, Ted Ross