People v. McCullum , 66 Ill. 2d 306 ( 1977 )
People v. Harris , 72 Ill. 2d 16 ( 1978 )
People v. Bilyew , 73 Ill. 2d 294 ( 1978 )
People v. Trinkle , 68 Ill. 2d 198 ( 1977 )