It's not what can you describe as a real Italian "poliziottesco" (see movies with Merli, Milian, etc) but it's good directed by Carlo Lizzani (director of "Banditi a Milano" you have to see it!) and well played by Bud Spencer.
It's a pity that the main role is divided into 2+1 (as you can see), with the two young sons of Rosario Rao (Spencer), not great actors and after this movie never called to great roles, collaborating with Mancuso the lawyer (Nicola di Bari, decent musician/singer but atrocious actor).
You can see this movie if you have already see all the 70s Italian movie.
It's a pity that the main role is divided into 2+1 (as you can see), with the two young sons of Rosario Rao (Spencer), not great actors and after this movie never called to great roles, collaborating with Mancuso the lawyer (Nicola di Bari, decent musician/singer but atrocious actor).
You can see this movie if you have already see all the 70s Italian movie.