I'm the Law (1953)

Kirby starts investigating a case of fight fixing, only to end up uncovering a murder.

Kirby thought he had seen it all until he started investigating a blackmail scheme involving a bad guy, his ex-wife and a blind man.

As a secretary, you are paid to know everyone's business, keep track of it, organize it and help them remember it. But sometimes you hear too much for your own good, which is what happened to a gorgeous woman working as a secretary in a modeling agency.

The only clue to the identity of the assailants of a badly beaten sailor is a powder box given to the swabbie's galpal.

When a man is murdered in Central Park, the only witness to the crime is his young son.

Lt. Kirby goes undercover on the waterfront to investigate the death of a dockworker. He discovers that the owner of a trucking company is engaged in some shady business, involving evading customs and shipping illegal cargo to China.

Kirby searches for evidence in which to convict a man whom the police know is the brains behind many rackets.

The only clue Lt. Kirby has to a capital crime is a pair of tennis shoes. But Kirby's diligence proves invaluable when two murderers are apprehended.