The Mad Dog Killer
La belva col mitra (original)
Sadistic no-count killer Nanni Vitali and three other equally brutish hoodlums escape from prison. The foul foursome embark on a savage rape, murder, and robbery spree. Vitali even abducts and defiles frightened hapless lass Giuliana Caroli. Meanwhile, rugged police inspector Giulio Santini is determined to bag the despicable Vitali.
Starring Helmut Berger, Marisa Mell, Richard Harrison, Marina Giordana, Luigi Bonos, Vittorio Duse, Claudio Gora, Alberto Squillante, Nello Pazzafini, Antonio Basile
Watch "The Mad Dog Killer" on Amazon released in 1977. It's a crime and thriller movie, and has a rating of 6 out of 10 from Imdb which is fairly okay for this kind of movie, and is currently only available for purchase or rent.