The Secret Witness
Directed by	Thornton Freeland
Written by	Sam Spewack
Produced by	J.G. Bachmann
Starring	Una Merkel William Collier Jr. Zasu Pitts
Cinematography	Robert H. Planck
Edited by	Louis Sackin
Production company	Famous Attractions
Distributed by	Columbia Pictures
Release date	December 12, 1931 (1931-12-12)
Running time	66 minutes
Country	United States
Language	English

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.^[1] 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.

Cast

• Una Merkel as Lois Martin
• William Collier Jr. as Arthur Jones aka Casey
• Zasu Pitts as Bella
• Purnell Pratt as Capt. McGowan
• Ralf Harolde as Lewis Leroy
• Clyde Cook as Larson - Building Engineer
• June Clyde as Tess Jones
• Nat Pendleton as Gunner - Bodyguard
• Clarence Muse as Jeff - Building Janitor
• Hooper Atchley as Herbert 'Bert' Folsom
• Billy Bletcher as Radio Announcer's Voice
• Mike Donlin as Mike - Speakeasy Proprietor
• James Durkin as Detective
• Greta Granstedt as Moll
• Henry Hall as Police Commissioner Martin
• Paul Hurst as Officer Brannigan
• Rita La Roy as Sylvia Folsom
• Maston Williams as Contact Detective