Mosquito the Rapist (1976)

In the small community of Munich, Germany, a deaf-mute man named Mosquito terrorizes the town with his gruesome acts of violence. As an accountant by day and a sadistic killer by night, Mosquito preys on his victims, leaving a trail of blood and dismembered bodies. When a prostitute becomes his next target, the town must confront the horrors that lie within their midst.