People v. Williams , 57 Ill. 2d 239 ( 1974 )
People v. Higgins , 50 Ill. 2d 221 ( 1972 )
Brown v. Illinois , 95 S. Ct. 2254 ( 1975 )
Wong Sun v. United States , 83 S. Ct. 407 ( 1963 )
Miranda v. Arizona , 86 S. Ct. 1602 ( 1966 )