Ohio Rev. Code § 753.10: Parole of inmates.

The director of public safety may establish rules and regulations under which, and specify the conditions on which, a prisoner may be allowed to go upon parole outside of the buildings and enclosures of the workhouse. While on parole such person shall remain in the legal custody and under the control of such director, and subject at any time to be taken back within the enclosure of the institution. Full power to enforce the rules, regulations, and conditions, and to retake and reimprison any convict so paroled, is hereby conferred upon such director, whose written order shall be sufficient warrant for all officers named therein to authorize them to return to actual custody any conditionally released or paroled prisoner. All such officers shall execute such order the same as ordinary criminal process.

No parole shall be granted by such director without previous notice thereof to the trial judge.