People v. Brown , 136 Ill. 2d 116 ( 1990 )
People v. Donaldson , 91 Ill. 2d 164 ( 1982 )
People v. Caballero , 102 Ill. 2d 23 ( 1984 )
Strickland v. Washington , 104 S. Ct. 2052 ( 1984 )