Ohio Rev. Code Ann. § 2301.31
(A) If a person on parole is in the custody of a county department of probation provided for in division (A) of section 2301.27 of the Revised Code, any probation officer of that department may arrest the person without a warrant for any violation of any condition of parole, as defined in section 2967.01 of the Revised Code, or of any rule governing persons on parole. If a person on parole is in the custody of a county department of probation provided for in division (A) of section 2301.27 of the Revised Code, any probation officer or peace officer shall arrest the person without a warrant for any violation of any condition of parole or any rule governing persons on parole upon the written order of the chief probation officer of that department. Any peace officer may arrest the person without a warrant, in accordance with section 2941.46 of the Revised Code, if the peace officer has reasonable ground to believe that the person has violated or is violating any of the following that is a condition of the person's parole:
(D) As used in this section: