I spent much time in studying Italian police films of this era - and this one sticks out as one of the best. Unlike other Di Leo flicks - this one has a decent story, features B+ actors like Mario Adorf and Adolfo Celli (Mr. Largo in OO7's Thunderball), the editing is fast and rhythmic and it contains only one car chase but this one has it. The films owes its quality largely to the German-Italian actor Mario Adorf (already playing in one other Di Leo Film "Milano Calibro 9") - Adorf is witty, has a face with a thousand expressions and perfectly impersonates the change of small-town-pimp into a revenge-driven killing machine - without overdoing it. Unlike other films of this genre this one is tightly bound by a reasonable script, logical development of the characters and a rough, greasy camera-style. Editing is superb in timing, no frame is wasted for stupid dialogues or the typical 70ies mood shots (you see a scenery with someone walking and nothing happens). This film is perfect for exploring this genre.