Ohio Code § 1331.13

§ 1331.13.

If a court of record, or a judge thereof in vacation, in which is pending a civil

or criminal action or proceeding brought or prosecuted by the attorney general or

a prosecuting attorney for the violation of sections 1331.01 to 1331.14, inclusive, of the Revised Code , or an action or proceeding for a violation of a law, common or statute, against

a conspiracy or combination in restraint of trade, so orders, no person shall be excused

from attending, testifying, or producing books, papers, schedules, contracts, agreements,

or other documents in obedience to the subpoena or order of such court or a commissioner,

referee, or master appointed by such court to take testimony, or a notary public or

other person authorized to take depositions, when the order made by such court or

judge includes a witness whose deposition is being taken before such notary public

or other officer, for the reason that the testimony or evidence required of him may

tend to incriminate him or subject him to a penalty.  No person shall be prosecuted or subjected to a penalty for or on account of a transaction,

matter, or thing concerning which he may so testify or produce evidence, documentary

or otherwise, before such court, person, or officer.