The Big Racket (1976)
Nico Palmieri is a police inspector who battles against hoodlums terrorising a sleepy Italian village, extorting cash from the locals
Street Law (1974)
An engineer seeks vigilante justice against the gangsters who took him hostage, and forms an unlikely partnership with a young robber to bring them down
The Cynic, the Rat and the Fist (1977)
A hardened cop is left for dead by the henchmen of a escapee gangster he had previously arrested, and upon recovery relentlessly pursues them