Deranged murderer Nanni Vitali (a completely unhinged performance by Helmut Berger of SALON KITTY and THE DAMNED) and three violent thugs escape from prison and begin a psychotic spree of robbery, rape and revenge. But when Vitali brutalizes a beautiful young woman (the luscious Marisa Mell of DANGER: DIABOLIK and PERVERSION STORY), he lights the fuse on a deadly trap set by an obsessed cop (Richard Harrison). In this bloody urban jungle, life is cheap, vengeance is law … mehrand the ultimate maniac is a MAD DOG KILLER.Also known as BEAST WITH A GUN and FEROCIOUS, this rarely seen sickie was the final film directed by the notorious Sergio Grieco (THE SINFUL NUNS OF SAINT VALENTINE) and is packed full of vicious sex, relentless violence and more gloriously sleazy delights. weniger