Ohio Rev. Code Ann. § 2967.132
(A) As used in this section:
(1) "Aggravated homicide offense" means any of the following that involved the purposeful killing of three or more persons, when the offender is the principal offender in each offense:
(C) Notwithstanding any provision of the Revised Code to the contrary, and regardless of when the offense or offenses were committed and when the sentence was imposed, a prisoner who is serving a prison sentence for an offense other than an aggravated homicide offense and who was under eighteen years of age at the time of the offense, or who is serving consecutive prison sentences for multiple offenses none of which is an aggravated homicide offense and who was under eighteen years of age at the time of the offenses, is eligible for parole as follows:
(E)
(2) The parole board shall ensure that the review process provides the prisoner a meaningful opportunity to obtain release. In addition to any other factors the board is required or authorized to consider by rule or statute, the board shall consider the following factors as mitigating factors: