Another one of the FBI’s earliest African-American special agents was Thomas Leon Jefferson—an experienced investigator who had worked for a detective agency in Chicago from about 1904 to 1921. Jefferson entered the Bureau as an agent on September 22, 1922 and participated in many investigations, working on the Garvey case, car thefts, and prostitution/human trafficking matters. In November 1924, he was commended by Acting Director Hoover for his work on a bankruptcy investigation. Jefferson retired in January 1930.