May a Lawyer Waive His Client's Sixth Amendment Right of Confrontation ?

In People v. Campbell, 208 Ill. 2d 203, 220-21, 802 N.E.2d 1205, 1215, 280 Ill. Dec. 684 (2003), the supreme court held that "counsel in a criminal case may waive his client's sixth amendment right of confrontation by stipulating to the admission of evidence as long as the defendant does not object to or dissent from his attorney's decision, and where the decision to stipulate is a matter of legitimate trial tactics or prudent trial strategy."