Ohio Revised Code Title XXIX. Crimes Procedure § 2941.45

Any person serving a sentence in jail or the workhouse, who is indicted or informed against for another offense, may be brought before the court of common pleas upon warrant for that purpose, for arraignment and trial. Such person shall remain in the custody of the jailer or keeper of the workhouse, but may be temporarily confined in the jail, if a prisoner in the workhouse.

If such prisoner is convicted and sentenced upon trial, he shall be returned to the jail or workhouse to serve out the former sentence before the subsequent sentence is executed.