Alias Boston Blackie.

Boston Blackie (Chester Morris) decides to entertain the inmates at his old "alma mater" by bringing a variety show headed by clown Roggi McKay. Joe Trilby (Larry Parks) and Inspector Farraday (Richard Lane) unexpectedly join the group on the bus, just to keep an eye on Blackie. Joe claims he is innocent and that Duke Banton and someone named Steve got him to drive them to the crime scene without telling him why. Blackie and his sidekick "the Runt" (George E. Stone) arrive too late and find only a dead body.