This relatively obscure German film is very well-done. It's about a schizophrenic man who murders uncontrollably. The film features very innovative camera work (at the time) which includes a recurring POV shot that will impress, no doubt. What makes this film tough to watch is the very realistic murder scenes, which include a graphic rape/murder and the long, drawn-out drowning death of an invalid. It reaches levels of intensity seen in other great psycho films like Seul Contre Tous and Henry: Portrait of a Serial Killer. The lead actor is very convincing, and makes you feel sorry for him as well as loathe him. A highly recommended film.