Robert Bruce Sinclair (May 24, 1905 – January 3, 1970) was an American director who worked in film, theater and television.

Robert Bruce Sinclair was born in Toledo, Ohio, the son of an insurance agent.

During World War II, Sinclair was a Captain in the Air Force and directed a training video called Resisting Enemy Interrogation (1944) which received a nomination for best feature-length documentary at the 17th Academy Awards.

[6] Sinclair published The Eleventh Hour in 1951, which was his only novel and was nominated for a 1952 Edgar Award for Best First Novel by an American Author.

[1] The assailant, Billy McCoy Hunter, a graduate student at UCSB, was later arrested and charged with murder.