Woman on the Run (1950)
B&W noir crime thriller about a man who sees a murder committed against a witness in an upcoming trial and decides to go into hiding after the police want him to identify the killer in court. The police keep a close eye on his wife, hoping she will lead them to him before the killer can find him. Not sure why the title is 'Woman on the Run' because it's about a man on the run while his wife desperately tries to contact him.