The Nail Gun Massacre 4K 1985

A young girl is brutally raped by workers building a shed, and after a while they are killed with a pneumatic hammer. It would be only them, but the killer in camouflage, a motorcycle helmet covered with duct tape and with a yellow compressed air tank behind his back, went to kill everyone who got in his way, regardless of sex and age. The sheriff and the doctor investigated the whole case, and only when the number of corpses exceeded the first ten, they were struck by a brilliant idea of who could be involved in all these crimes....