Is there any case law in which a defendant has made an offer to plead guilty?

People v. Hamilton (1963) 60 Cal.2d 105, cited by appellant, does not help him. There, unlike here, the defendant had met with the prosecutor and offered to plead guilty if arrangements could be made to assure him a life sentence. (Id. at pp. 112-113.) Here, however, appellant did not make a considered effort to negotiate a plea. Instead, he simply made an unsolicited statement that he was guilty, apparently out of the blue. It is telling that appellant did not request any consideration in exchange for the purported offer, nor did he ever pursue it again after the outburst.