Investigation of a Citizen Above Suspicion

Gian Maria Volonté

Dottore

Age 37 (died at 61)

Florinda Bolkan

Augusta Terzi

Age 29 (now 85)

Gianni Santuccio

Police Prefect

Orazio Orlando

Biglia

Age 33 (died at 53)

Sergio Tramonti

Antonio Pace

Arturo Dominici

Mangani

Age 52 (died at 74)

Aldo Rendine

Nicola Panunzio

Age 53 (died at 70)

Massimo Foschi

Augusta's Husband

Age 32 (now 88)

Aleka Paizi

Governess

Age 51 (died at 90)

Vittorio Duse

Canes

Age 54 (died at 89)

Pino Patti

Wiretapping Dep. Head

Salvo Randone

Plumber

Age 64 (died at 84)

Fulvio Grimaldi

Patanè

Age 36 (now 92)

Giuseppe Aguinaldo Nicastro

Filippo De Gara

Ugo Adinolfi

Age 29 (died at 75)

Franco Marletta

Giacomo Bellini

Giuseppe Terranova

Vincenzo Falanga

Age 52 (died at 79)

Roberto Bonanni

Guido Buzzelli

Gino Usai

Calogero Azzaretto

Man Listening the Speech of Dottore (uncredited)

Gianfranco Barra

Interrogation Officer (uncredited)

Aristide Caporale

Man at Police Headquarters (uncredited)

Ettore Geri

Officer Attending the Final Confession (uncredited)

Alfonso Giganti

Policeman (uncredited)

Franco Magno

Officer Attending the Final Confession (uncredited)

Enrico Marciani

Officer Attending the Final Confession (uncredited)

Enzo Mondino

Officer Attending the Final Confession (uncredited)

Mario Pascucci

Policeman (uncredited)

Fulvio Pellegrino

Policeman Listening the Speech of Dottore (uncredited)

Elio Petri

Policeman Sleeping During Dottore's Address (uncredited)

Age 41 (died at 53)

Mario Silvestri

Officer Attending the Final Confession (uncredited)

Alessandro Tedeschi

Man Listening to Speech (uncredited)

Armando Tortorici

Arrested Contestant (uncredited)

Romano Moraschini

Policeman (uncredited)

Ugo Ballester

Officer Attending the Final Confession (uncredited)