One of the first Italian detective movies ever made. Political thriller but also psychological and surreal drama, it's probably the best in its genre. In a grotesque way, the director and writer Elio Petri perfectly portrays the political and social contest in 70's Italy, period of violent civil demonstrations and heavy repression by authorities.
At the centre of the movie is a gorgeous Gian Maria Volonté, who plays the f*ckest fascistoid and schizoid policeman ever seen on a screen. His omnipotence delirium is such that, after having committed a crime, intentionally leaves clues everywhere just to prove he's an untouchable citizen above suspicion. Volonté in his most intense and charismatic role!
The film is also remarkable for the original screenplay by Petri with Ugo Pirro and the amazing score by Ennio Morricone.
Gian Maria Volonté persuasively personifies a suave, spitefully malevolent kind of hitchcockian sociopath. A surreal and strong meditation about how some human beings can be corrupted by power. A fundamental allegory to understand the Italian sociopolitical situation of that time, and possibly to draw parallels with any present so-called democratic system of government.