The Mouthpiece is a 1932 American pre-Code crime drama film starring Warren William and directed by James Flood and Elliott Nugent.

At the suggestion of a friendly bartender (Guy Kibbee), he decides to switch teams and become a defense attorney specializing in the representation of gangsters and other unsavory people.

He will use any tactic to get his clients acquitted, up to and including drinking a slow-acting poison from a bottle of evidence to prove that the substance isn't lethal.

The jury acquits the man not knowing that immediately after, Day rushes into a mob doctor's office for a pre-arranged stomach pump.

He lets them know that he has all of their secrets in a safe-deposit box, along with instructions for the bank to forward the contents to the District Attorney in the event of his unnatural death.