The Big Heat (1953)

Dave Bannion, a determined homicide detective, investigates the suspicious suicide of fellow cop Tom Duncan. Duncan's mistress contradicts the official story, leading Bannion to uncover a deeper conspiracy tied to crime boss Mike Lagana. He clashes with Lagana's brutal and unwavering enforcers and forms an uneasy alliance with an unlikely ally to confront the corruption plaguing the city before anyone else gets hurt.