Ohio Rev. Code § 733.75: Proceedings on the trial.

On the day designated under section 733.73 of the Revised Code for the trial, the trial shall take place, unless continued on affidavit for good cause to another time not exceeding ten days. On the trial, the village solicitor or city director of law shall appear for the prosecution, examine witnesses designated by the complainant, and such others as he discovers, and either party may have process from the probate judge to compel the attendance of witnesses.