State v. Sturm (1981), 66 Ohio St.2d 483, 422 N.E.2d 853, involved a trial court's obligation pursuant to Crim.R. 11 to advise a criminal defendant of constitutional rights waived by a guilty plea. In that case, the court held that the trial court failed to inform Sturm of his constitutional right to confront his accusers, a right expressly identified in Boykin v. Alabama (1969). Therefore, the court vacated Sturm's plea and remanded the case.