Mr. District Attorney is a ⁠radio⁠ ⁠crime drama⁠ produced by ⁠Samuel Bischoff⁠ that aired on ⁠NBC⁠ and ⁠ABC⁠ from April 3, 1939 to June 13, 1952 (and in transcribed syndication through 1953). The series focused on a crusading ⁠district attorney⁠ initially known only as Mister District Attorney or Chief, and was later translated to ⁠television⁠. On television the attorney's name was Paul Garrett, and the radio version adopted the name in its final years when ⁠David Brian⁠ played the role. A key figure in the dramas was secretary Edith Miller. https://en.wikipedia.org/wiki/Mr._District_Attorney