Ohio Rev. Code Ann. § 2941.021

Any criminal offense which is not punishable by death or life imprisonment may be prosecuted by information filed in the common pleas court by the prosecuting attorney if the defendant, after he has been advised by the court of the nature of the charge against him and of his rights under the constitution, is represented by counsel or has affirmatively waived counsel by waiver in writing and in open court, waives in writing and in open court prosecution by indictment.