Gacy (also known as The Crawl Space) is a 2003 American crime horror thriller film written and directed by Clive Saunders, and co-written by David Birke. A direct-to-video release, it is based on the crimes of John Wayne Gacy, an American serial killer who raped, tortured, and murdered at least thirty-three men and boys in Chicago, Illinois during the 1970s. It stars Mark Holton as Gacy.