Scream Bloody Murder (1973)
A disturbed young boy who kills his father with a tractor is institutionalized. Years later, when he's finally released, he goes on a murderous rampage after he finds out that his mother has remarried.
A disturbed young boy who kills his father with a tractor is institutionalized. Years later, when he's finally released, he goes on a murderous rampage after he finds out that his mother has remarried.