 "Radio Pictures Presents: True Detective Stories of Celebrated Cases From the Records of Nick Harris, Internationally Famous Criminologist." So the titles read at the start of this early sound-period two-reeler whodunit, directed by the great Spencer Gordon Bennet. Nick Harris - founder of the Nick Harris Detective Agency - and media-savvy, old-time-radio star, who coined the phrase "Crime does not pay", here shifting it to the silver screen, recounts the story of "the famous police case of the Mason murder mystery".