Inspector Betti (Maurizio Merli) is transferred to Naples and immediately after his arrival receives a warm welcome from The Commandante (Barry Sullivan), the city's crime lord. Betti then goes on a personal mission against corruption and organized crime, and tries to force the syndicate out of town with any means necessary.
Maurizio Merli: Commissioner Betti
John Saxon: Francesco Capuano
Barry Sullivan: 'O Generale
Elio Zamuto: Franco Casagrande
Silvano Tranquilli: Paolo Gervasi
Maria Grazia Spina: Gervasi's wife
Guido Alberti: Quaestor
Tom Felleghy : Commissioner in Genoa
Violent Naples was released in Italy on August 7, 1976 where it was distributed by Fida Cinematografica. It had a domestic gross of 2,046,936,220 Italian lire.
The Monthly Film Bulletin described the film as a "nasty, brutish and over-long escapade" that was plagirizing Dirty Harry. The review found thef ilm tobe "lacklustre in style, without a trace of tension to its slam-bang action."