Key Witness (1947) is a Crime, Drama, Thriller film that follows a man takes over the identity of a dead man while on the lam from a crime he didn't commit. Key Witness is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 4.8 out of 10 from 14 votes. Fans of crime movies may also want to explore similar titles below.