Which American film, stage, radio and television actor contributed to the screenplay of "Citizen Kane" (1941) and appeared in "Syndicate Sadists?"
Syndicate Sadists: Syndicate Sadists (Italian: "Il giustiziere sfida la città" ) is a 1975 "poliziotteschi" film directed by Umberto Lenzi It stars Joseph Cotten and Tomas Milian. Joseph Cotten: Joseph Cheshire Cotten, Jr. (May 15, 1905 – February 6, 1994) was an American film, stage, radio and television actor. Joseph Cotten:  He first gained worldwide fame in three Orson Welles films: "Citizen Kane" (1941), "The Magnificent Ambersons" (1942), and "Journey into Fear" (1943), for which Cotten was also credited with the screenplay.
Joseph Cotten