The Human Jungle

Police Lt. Leonard Diamond vies to bring a clever, well connected, and sadistic gangster to justice all the while obsessing over the gangster's girlfriend.

When an employee at an illegal gambling den dies suspiciously, her sister, Nancy, looks into the situation and falls for Johnny O'Clock, a suave partner in the underground casino. Selfish and non-committal by nature, Johnny slowly begins to return Nancy's affection and decides to run away with her, but conflict within his business threatens their plans. As Johnny tries to distance himself from the casino, his shady past comes back to haunt him.

Slick lawyer Thomas Farrell has made a career of defending mobsters in trials. It's not until he meets a lovely showgirl at a mob party that he realizes that there's more to life than winning trials. Farrell tries to quit the racket, but mob boss Rico Angelo threatens to hurt the showgirl if Farrell leaves him.

A police detective's violent nature keeps him from being a good cop.

In New York City, a bank robbery of $300,000 goes unsolved for a year, until some of the marked bills are found in a Los Angeles drugstore theft. Police detectives Cal Bruner and Jack Farnham investigate and are led from the drugstore to a nightclub, where singer Lilli is another recipient of a stolen bill. With Lilli's help, the partners track down the remaining money, but both Lilli and Jack are dismayed when Cal decides he wants to keep part of it.

While executing an armored car heist in Los Angeles, icy crook Dave Purvis shoots policeman Lt. Phillips before he and his cronies make off with the loot. Thinking he got away scot-free, Purvis collects his money-crazy mistress, Yvonne, then disposes of his partners and heads out of town. What Purvis doesn't know is that Phillips' partner, tough-as-nails Lt. Cordell, is wise to the criminal's plans and is closing in on his prey.

After two gang-related killings in "Center City," a suspect (who was framed) is arrested, released on bail...and murdered. Inspector Briggs of the FBI recruits a young agent, Gene Cordell, to go undercover in the shadowy Skid Row area (alias George Manly) as a potential victim of the same racket. Soon, Gene meets Alec Stiles, neurotic mastermind who's "building an organization along scientific lines." Stiles recruits Cordell, whose job becomes a lot more dangerous.

Reformed parolee Steve Lacey is caught in the middle when a wounded former cellmate seeks him out for shelter. The other two former cellmates then attempt to force him into doing a bank job.

An upper-crust family dinner is interrupted by a police inspector who brings news that a girl known to everyone present has died in suspicious circumstances. It seems that any or all of them could have had a hand in her death. But who is the mysterious Inspector and what can he want of them?

Eddie Miller struggles with his hatred of women, he's especially bothered by seeing women with their lovers. He starts a killing spree as a sniper by shooting women from far distances. In an attempt to get caught, he writes an anonymous letter to the police begging them to stop him.