Scarecrow(2002)

A high school outcast who lives in a trailer with his mother finally meets a friend. He wants to ask her if they can go the next step, but then sees her kissing another boy at a party. He runs home only to find his mother having sex with a drunk. He starts yelling, but is countered by the drunk when he suffocates him and makes him look like he hung himself. The scarecrow comes in when the boy's soul is pushed into it. He goes out for revenge.