United States v. Humberto Lechuga , 994 F.2d 346 ( 1993 )
United States v. Michael D. West , 15 F.3d 119 ( 1994 )
united-states-v-luis-arturo-escobar-united-states-of-america-v-michael , 50 F.3d 1414 ( 1995 )