Elevator to the Gallows

From The Movie Snob:

Elevator to the Gallows (B-). Originally released in 1957, this is a French film directed by Louis Malle and sporting a cool-jazz soundtrack by Miles Davis. Jeanne Moreau played Florence, a woman married to a shadowy, rich, and powerful war profiteer. She is having an affair with Julien Tavernier, a former paratrooper and employee of her husband. Julien successfully pulls off their plan to murder Florence's husband and make it look like a suicide, but as he makes his getaway he realizes he has left a clue at the scene of the crime. When he goes back to retrieve it, everything goes awry -- he gets stuck in an elevator, his car is stolen by two no-good teenagers who go off to do some crimes of their own, and Florence wanders around Paris all night looking for her missing lover. It kept me wondering how everything would turn out, and it's an economical 87 minutes long. Not bad.