Gacy (2003) on Netflix

Wisconsin, 1953. John Gacy, Sr. verbally and physically abuses his son during a fishing trip. Iowa, 1968. The adult John Wayne Gacy Jr. is convicted of sodomy and after 18 months he is released and settles in Des Plaines near Chicago. From 1972, 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 30 innocent boys and teenagers 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.