United States v. Richard C. Koenig , 912 F.2d 1190 ( 1990 )
United States v. Ronald Wayne Johnson , 618 F.2d 60 ( 1980 )
United States v. Gustavo Valdez-Soto, United States of America v. Fabio Gomez-Tello , 31 F.3d 1467 ( 1994 )