Murder Is My Beat

A nightclub singer is arrested and accused of murder despite her protestations of innocence. Though convicted, she does not change her story. She and one of the arresting officers are boarding a prison-bound train when she spies the man she supposedly killed. She and the officer give chase and begin hunting for the man. Unfortunately, the night club singer vanishes leaving the officer, who is by now convinced of her innocent to plead with his superiors for the chance to solve the case, which turns out to be a bit more convoluted that it seems.