Gacy (2003)

Wisconsin, 1953, John Gacy, Sr. forces his fat teenager son to have sex with him; after 18 months he is released and returns home. John Wayne Gacy, Jr. grows up as a respected family father and businessman, even tipped for a political career with the Democrats. Alas, while he loudly abhors homosexuality, the monster uses the crawl space under his home for the vice of his abusive father: over thirty innocent boys end up buried there, after horrible abuse ending in torturous death, causing it to reek unspeakably, being full of insects decomposing the stream of young corpses. Some victims worked for him, others he just picked up 'for fun' or lured in under various pretenses, in the end even the strong Tommy who rented his guest room...