Can a defendant waive his right to self-incrimination at a hearing?

effective counsel, as guaranteed by the Sixth Amendment, may require the defendant to waive the right against self-incrimination, as guaranteed by the Fifth Amendment. The need for use immunity in the context of a Marsden hearing is of course especially acute because at a Marsden hearing a defendant is acting, in many material respects, on his or her own and without the benefit of counsel. Thus ... statements made in a Marsden hearing are subject to use immunity .... [Citation.]" (People v. Knight, supra, 239 Cal.App.4th at p. 8.)