Ohio Rev. Code § 2317.37: Cross-examination by adverse party.

Any person who has furnished information on which a report or finding mentioned in section 2317.36 of the Revised Code is based may be cross-examined by the adverse party, but the fact that his testimony is not obtainable shall not render the report or finding inadmissible, unless the trial court finds that substantial injustice would be done to the adverse party by its admission.