Ohio Revised Code Title XXIX. Crimes Procedure § 2935.05

When a person named in section 2935.03 of the Revised Code has arrested a person without a warrant, he shall, without unnecessary delay, take the person arrested before a court or magistrate having jurisdiction of the offense, and shall file or cause to be filed an affidavit describing the offense for which the person was arrested. Such affidavit shall be filed either with the court or magistrate, or with the prosecuting attorney or other attorney charged by law with prosecution of crimes before such court or magistrate and if filed with such attorney he shall forthwith file with such court or magistrate a complaint, based on such affidavit.