Ohio Revised Code Title XXIX. Crimes Procedure § 2941.48

In any case pending in the court of common pleas, the court, either before or after indictment, may require any witness designated by the prosecuting attorney to enter into a recognizance, with or without surety, in such sum as the court thinks proper for his appearance to testify in such cause. A witness failing or refusing to comply with such order shall be committed to the county jail until he gives his testimony in such case or is ordered discharged by the court. If a witness is committed to jail upon order of court for want of such recognizance, he shall be paid while so confined like fees as are allowed witnesses by section 2335.08 of the Revised Code. The trial of such case has precedence over other cases and the court shall designate any early day for such trial.