United States v. Peltier , 95 S. Ct. 2313 ( 1975 )
Illinois v. Krull , 107 S. Ct. 1160 ( 1987 )
United States v. Leon , 104 S. Ct. 3405 ( 1984 )
Michigan v. DeFillippo , 99 S. Ct. 2627 ( 1979 )