Pandora's Defense — Gilbert M. Stack

From the pages of Alfred Hitchcock's Mystery Magazine: When bare knuckle boxer Corey Callaghan’s trainer is locked in prison on a charge of murder, the sheriff doesn’t much care if he’s innocent or guilty. That’s because he doesn’t expect the case to go before a judge and jury. You see, the dead man’s son is leading a posse to town looking for vengeance and Corey’s fists aren’t likely to be enough to save the old man. It looks like Patrick’s only chance to avoid a lynching is lady luck, a named gambler, Pandora Parson, and the strength of her defense.