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).

Created, written, and directed by former law student Ed Byron, the series was inspired by the early years of New York governor Thomas E.

Byron lent an air of accuracy and immediacy to his scripts through close study of crime statistics, a library of criminology texts, following the newspapers and even visiting rough bars to gain tips, background and color from crooks and police.

[6] In three films released by Republic Pictures in the early 1940s, the district attorney was named P. Cadwallader Jones and was assisted by journalist Terry Parker.

The radio cast reprised their roles, with Jay Jostyn as Mr. District Attorney, Vicki Vola as Miss Miller and Len Doyle as Harrington.