Hunted City(1979)

Commissario Paolo Ferro (Maurizio Merli) stars as a (typical) tough cop again. This time he returns to the city of Milan to go after a murder corporation. Acampora (Mario Merola) is believed to be the prime suspect although he later proves to be one of the mafia's targets. As if all that wasn't enough, Paolo has to face his own nephew who seems to be involved in all sorts of dirty business.