The Cynic, the Rat and the Fist (1977)

Luigi Maietto (Chinaman) escapes from prison he then orders two henchman to murder the inspector whose testimonal led to his being jailed. Inspector Tanzi is left for dead but lives. The local newspapers cover up for him and pretend the assassination had worked. When Tanzi's able to his superior wants him to hide in Switzerland. But Tanzi defies him and intends to make sure that Maietto is put back in prison.