"Mr. District Attorney, champion of the people, defender of truth, guardian of our fundamental rights to life, liberty, and the pursuit of happiness!"
The nameless district attorney of radio fame was played by Jay Jostyn during most of the run of the show, from 1940 to 1952. During 1939, during the show's first year the character was played by first, Dwight Weist, then by Raymond Edward Johnson; David Brian played the character in transcribed syndication from mid-1952 through 1953. The crusading D.A. did not have a name until the show became televised -- Paul Garrett; the name was then used during David Brian's run with the series.
Mr. District Attorney (or, "Chief," as he was sometimes called) had a faithful secretary in Edith Miller (played by Vicki Vola) and a chief investigator, Len Harrington (played by Len Doyle from 1940 onward).
The show was inspired by the early career of Thomas E. Dewey.
"The Case of the Deadly Snowflake" aired on May 26, 1948.
BONUS: Can you guess how Mr. District Attorney solved the case of the COP KILLER?
From Radio-TV Mirror, February 1952, a two-page photo-spread!