Junior G-Men was a boys club and popular culture phenomenon during the late 1930s and early 1940s that began with a radio program and culminated with films featuring the Dead End Kids.
After leaving the Federal Bureau of Investigation and a brief stint in Hollywood, Melvin Purvis hosted a children’s radio program called “Junior G-Men” in 1936. Purvis had become a national hero for his record as an FBI agent during the so-called "war on crime" in the early 1930s, most notably for leading the manhunt that ended with the death of John Dillinger. As a result of this fame, Purvis was seen as a real-life counterpart to the fictional detectives, such as Dick Tracy, that proliferated in the popular culture targeting boys during this period. As part of the radio program, listeners could join a "Junior G-Men" club and receive badges, manuals, and secret agent props. Shortly thereafter, Purvis became the face of breakfast cereal Post Toastiest promotional detective club. The cereal company’s fictional “Inspector Post” and his “Junior Detective Corps” metamorphosed into an image of Purvis inviting boys and girls to become “secret operators” in his “Law and Order Patrols.”
As a result of this mass exposure, Junior G-Men clubs sprouted up throughout the United States and Canada as a "law and order" themed alternative to the Boy Scouts. Junior G-Men clubs found support from police departments and non-profit organizations that saw them as a means of combating juvenile delinquency. The clubs structured children's time with activities designed to instill law-abiding attitudes, as reflected in their slogan "It's easier to build boys than to mend men."