Desc: Điều Tra Một Công Dân Không Thể Nghi Ngờ: Directed by Elio Petri. With Gian Maria Volontè, Florinda Bolkan, Gianni Santuccio, Orazio Orlando. A high-ranking police inspector murders his mistress and - in a sardonic test to prove that he is above suspicion - deliberately plants clues that indicate his responsibility for the crime.