Andresen v. Maryland , 96 S. Ct. 2737 ( 1976 )
Illinois v. Gates , 103 S. Ct. 2317 ( 1983 )
United States v. Leon , 104 S. Ct. 3405 ( 1984 )
Massachusetts v. Sheppard , 104 S. Ct. 3424 ( 1984 )