The Tough Ones (1976)
A tough, violent cop who doesn't mind bending the law goes after a machine-gun-carrying, hunchbacked psychotic killer.
Directed by: Umberto Lenzi
Starring: Maurizio Merli, Arthur Kennedy, Tomas Milian, Maria Rosaria Omaggio, Giampiero Albertini, Ivan Rassimov
Links: IMDb, Movie posters, Movie stills