Full awards and nominations of Investigation of a Citizen Above Suspicion
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- 44th Academy Awards (1972) - Movies from 1971
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43th Academy Awards (1971) - Movies from 1970
- winner Best International Film
- 28th Golden Globes Awards (1971) - Movies from 1970
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Cannes Film Festival 1970
- nom. Golden Palm: Best Picture
- winner Grand Prix
- winner FIPRESCI
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New York Film Critics Circle - Year 1970 - http://nyfcc.com
- nom. Best Screenplay (Ugo Pirro, Elio Petri)
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David di Donatello Awards 1970
- winner Best Film
- winner Best Actor (Migliore Attore) (Gian Maria Volonté)