Hideout (movie, 1949)

Philip Ford's crime thriller stars Lloyd Bridges as a city attorney who comes to the dawning realization that a jewelry heist may be behind the discovery of a dead body in the park -- and that the culprit may be one of the town's leading citizens (Ray Collins). Unfortunately, his investigation is hampered by his girlfriend and ex-secretary (Lorna Gray), who could very well be in cahoots with the bad guys.