Ronald DeFeo Jr.

Ronald DeFeo Jr. is a major character in The Amityville Murders he is played by John Robinson, and is loosely based off of the real life Ronald DeFeo Jr. (Real Life)

Overview
Ronnie makes his first appearance at his birthday party. After a incident in the red room doing a séance along with his sister and some of their friends they flee upstairs and his father proceeds to beat him after Ronnie insults him. At his party outside he is given a new car from his grandfather Michael Brigante, but his father tries to take the keys away from his son saying that he has to earn it, but Michael Brigante intervenes and reprimands him and Ronnie is given back the car keys. Sometime later on Ronnie is accused of stealing the money his father got which was likely from a crime family, and he is threatened at gunpoint in front of the family until Dawn reveals she called the police. It's also revealed that he was rejected from Syracuse University.