United States v. Matlock , 94 S. Ct. 988 ( 1974 )
Katz v. United States , 88 S. Ct. 507 ( 1967 )
Griffin v. Wisconsin , 107 S. Ct. 3164 ( 1987 )
United States v. Knights , 122 S. Ct. 587 ( 2001 )