Ronald Joseph "Butch" Defeo Jr. is an American mass murderer who was convicted of the 1974 murders of his parents and siblings in their 112 Ocean Avenue home in Amityville, Long Island, New York.  The case is what inspired the book and movie, The Amityville Horror.

Authentic prison Polaroid of Ronnie showing his arm, circa 2011-2013.

Ronald Butch Defeo Polaroid