If you loved Compulsion, try The Narrow Margin
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Richard Fleischer, and they sit in Crime / Thriller territory. If that's the register that drew you to Compulsion, the second film will land in a comparable space — through a different lens.
What The Narrow Margin is
Union Station. Dawn. A dropped glove. Two plainclothes cops wait, tasked with the cross-country protection of a mobster's widow. But a contract is out, and the train is long. Fleischer's B-movie intensity gets it done in just over an hour.

