The film was highly regarded in its own time , winning the Academy Award for Best Foreign Language Film , and both the FIPRESCI Prize and the Grand Prize at the 1970 Cannes Film Festival . Also it won as Best Foreign Language Film at the Kansas City Film Critics Circle Awards 1971 and the Edgar Award from the Mystery Writers of America for Best Mystery Screenplay
1970 Cannes Film Festival
1970 Cannes Film Festival
Investigation of a Citizen Above Suspicion