Radio's crusading prosecutor Mr. District Attorney fought crime on the air for over a decade. The upstanding public servant went after killers, con men, thieves, and enemy agents with equal passion and zeal for the law. We'll hear a pair of his radio adventures: Jay Jostyn stars in "The Case of the Sinister Cinema," originally aired on NBC on May 5, 1948. Then, David Brian stars in the syndicated episode "The Case of the Missing Corpse."