If pursuant to division (B)(3)(a) of this section a peace officer has reasonable grounds to believe that the offense of domestic violence or the offense of violating a protection order has been committed and reasonable cause to believe that family or household members have committed the offense against each other, it is the preferred course of action in this state that the officer, pursuant to division (B)(1) of this section, arrest and detain until a warrant can be obtained the family or household member who committed the offense and whom the officer has reasonable cause to believe is the primary physical aggressor. There is no preferred course of action in this state regarding any other family or household member who committed the offense and whom the officer does not have reasonable cause to believe is the primary physical aggressor, but, pursuant to division (B)(1) of this section, the peace officer may arrest and detain until a warrant can be obtained any other family or household member who committed the offense and whom the officer does not have reasonable cause to believe is the primary physical aggressor.
A department of mental health and addiction services special police officer or a department of developmental disabilities special police officer may arrest without a warrant and detain until a warrant can be obtained any person who has been hospitalized, institutionalized, or confined in an institution under the jurisdiction of the particular department pursuant to or under authority of section 2945.37, 2945.371, 2945.38, 2945.39, 2945.40, 2945.401, or 2945.402 of the Revised Code and who is found committing on the premises of any institution under the jurisdiction of the particular department a violation of section 2921.34 of the Revised Code that involves an escape from the premises of the institution.
R.C. § 2935.03