§ 137.12  POSSESSION OF DEADLY WEAPON WHILE UNDER DETENTION.
   (A)   DETENTION and DETENTION FACILITY have the same meanings as in R.C. § 2921.01.
   (B)   No person under detention at a detention facility shall possess a deadly weapon.
   (C)   Whoever violates this section is guilty of possession of a deadly weapon while under detention.
      (1)   Except as otherwise provided in division (C)(2) of this section, possession of a deadly weapon while under detention is a felony to be prosecuted under state law.
      (2)   If the offender, at the time of the commission of the offense, was under detention as an alleged or adjudicated delinquent child or unruly child and if at the time the offender commits the act for which the offender was under detention it would not be a felony if committed by an adult, possession of a deadly weapon while under detention is a misdemeanor of the first degree.
(R.C. § 2923.131) 
Statutory reference:
   Possession of deadly weapon while under detention, felony offenses, see R.C. § 2923.131