umberto lenzi try his hand at just about every popular type of film in italy during the sixty and seventy and eighty and and while he have some very nice entry on his list of directorial credit while it have to be say that he isn not the best director to try his hand at the like of giallo and zombie and cannibal movie . however and when it come to crime film while lenzi come into his own and and just like almost human a couple of year earlier and violent naples be an entertaining and nasty little crime thriller . like every film in this sub genre and the major influence come from the masterpiece american film dirty harry and and here we follow a copper not too far remove from clint eastwood famous character . commissario betti be your typical disgruntled cop that favour violence over proper police procedure . he feed up with the way that naples be be run by the criminal and and so set his sight on the commandante . however and this man isn not easy to bring down and and since betti be receive no help from his fellow townsman and the task of end crime in naples be leave to our lead man . the title of the film lead the viewer to expect lot of violence and and lenzi certainly doesn not disappoint in this respect . we have get bowl ball to the head and a young woman have her face scrap off on a move train and a man impale on a sharp fence and many other such delight . overall and it have to be say that this film isn not very original and but lenzi injects some freshness into it with a barrage of excite chase scene ( the best of which take a point of view shot from the front of a motorbike ) and violent shootout . the good thing about these polizia movie be that they be play out for pure entertainment value and meaning that lenzi be free from try to be arty and and can pack in as much violence a he like while a fact which be often capitalise on . the film benefit from a strong italian cast and include maurizio merli while who may be no clint eastwood and but still deliver a strong and entertaining lead performance . john saxon get to join in the fun also and and there also a place for fellow american actor barry sullivan and in the role of the villain . overall and if youre into italian cop movie while this isn not one to miss .