Roma.During a clash between demonstrating laborers (whose fight the students have joined) a policeman and a student are both killed. The investigating magistrate - in charge of the case with two commissioners - wants to believe to the version of the police: the student was killed by one of the laborers, while the policeman would have been killed by Massimo Trotti.
| Writing | Ugo Liberatore | Screenplay |
| Directing | Mauro Bolognini | Director |
| Writing | Ugo Pirro | Story |
| Costume & Make-Up | Maria Baroni | Costume Design |
| Camera | Giuseppe Ruzzolini | Director of Photography |
| Sound | Ennio Morricone | Original Music Composer |
| Production | Gianni Hecht Lucari | Producer |
| Art | Gianfranco De Dominicis | Set Decoration |
| Editing | Nino Baragli | Editor |
| Writing | Ugo Pirro | Screenplay |
| Art | Guido Josia | Production Design |