Murderabilia - Notorious Serial Killer Artwork - John Wayne Gacy (1942-1994) Oil painting entitled 'Skull Clown' - Signed on the reverse and to the front at the corner, framed measures 30x35cm approx. Note: John Wayne Gacy was an American serial killer who sexually assaulted, tortured and murdered at least 33 teenaged boys and young men between 1972 and 1978