Investigation of So-Called "Rackets." hearings before the United States Senate Committee on Commerce, Subcommittee on S. Res. 74, Seventy-Third Congress, second session, on Aug. 14, 15, Oct. 3, 23, 24, Nov. 23, 24, Dec. 21, 1933. Vol. 1: Part 1-5 :

Also investigates the problem of crime prevention in general. Oct. 3, 1933 hearing was held in Detroit, Mich; Oct. 23, 24, 1933 hearings were held in Chicago, Ill.; Aug. 14, 15, Nov. 23, 24, Dec. 21, 1933 hearings were held in NYC.