United States v. George Douglas Vaughn , 797 F.2d 1485 ( 1986 )
United States v. Manuel Gonzalez, United States of America v. Tanya Gonzalez , 800 F.2d 895 ( 1986 )
United States v. Arnold R. Limatoc , 807 F.2d 792 ( 1987 )
United States v. Leon , 104 S. Ct. 3405 ( 1984 )