The Secret Witness (1931)
Genres: Mystery, Drama
Cast: Una Merkel, ZaSu Pitts
The Secret Witness is a 1931 American pre-Code drama film, directed by Thornton Freeland and starring Una Merkel, William Collier Jr. and Zasu Pitts. It is an adaptation of the novel Murder in the Gilded Cage by Sam Spewack. The screenplay concerns a man who is found murdered in his luxury apartment. His neighbors believe that the wrong man has been arrested and set out to solve the crime.