For the Defense (1930 film)

For the Defense is a 1930 Pre-Code crime drama film starring William Powell as a lawyer whose ethics are challenged when the woman he loves hits and kills a pedestrian while out driving with another suitor.

In New York City, William Foster (William Powell) is a criminal defense attorney so successful that prosecutors regard him as a menace. He holds himself to high ethical standards but is willing to mislead without actually lying.

Foster defends a man who planned a murder using explosives. District Attorney Stone (William B. Davidson) displays a vial and says chemical tests have shown that the liquid in it is sensitive nitroglycerin. Foster sniffs the liquid, questions him to verify the chain of custody, and then smashes the vial dramatically on the floor. When order is restored, he explains to the judge that he knew it was safe because nitro has a distinctive smell, and Stone says he had removed the actual nitro for safety after the chemical test. But Foster points out that only the liquid now in the bottle was entered into evidence, and wins his case.

Foster is in love with actress Irene Manners (Kay Francis), and she loves him, but she wants to be married and he does not. When another suitor, Jack Defoe (Scott Kolk), proposes to her, she says she needs to tell Foster about him before she can accept; but she finds she cannot do so. She stays out late enough at night with Defoe to leave only one implication of what they were doing, and while driving him home, she does agree to marry him. He suddenly hugs her and she loses control of the car, killing a bystander.

To protect Irene's reputation, Defoe urges her to leave the scene, lying that the victim is not badly hurt. Presumed to have been driving while drunk, he is charged with manslaughter. They both still conceal her involvement, but she begs Foster to defend him. He asks why she cares enough about Defoe to insist; she says she and Defoe are just friends, but she had already promised him on Foster's behalf, assuming Foster would be willing. Foster agrees, but finds that Defoe cannot tell a credible story at trial.