ty., Denver, Colo. (Robert N. U.S. Atty., with him on the brief), 'ntiff- appellee U.S. in No. 84-2600. Michael L. Bender, Bender & Treece, and Jay P.K. Kenney, Denver, Cob., were on the brief in 84-2600 for amicus curiae Nat. Ass'n of Criminal Defense Lawyers. Before HOLLOWAY, Chief Judge, and SETH, BAR