Vice Squad (1953)

When a police officer is shot arresting a car thief, Captain Barnaby uses his skills and contacts to track down the culprits and uncovers a bank heist plan in the process. Barnaby has no qualms about bending the law to achieve his ends, including trumped up charges to persuade his only witness to cooperate or detaining some call girls to coerce their madam to help him. In the meantime he deals with everyday police business, juggling seemingly trivial matters with more serious ones.