Ohio Rev. Code Ann. § 2305.51
(A)
(1) As used in this section:
(e) "Mental health service" means a service provided to an individual or group of individuals involving the application of medical, psychiatric, psychological, professional counseling, social work, marriage and family therapy, or nursing principles or procedures to either of the following:
(B) A mental health professional or mental health organization may be held liable in damages in a civil action, or may be made subject to disciplinary action by an entity with licensing or other regulatory authority over the professional or organization, for serious physical harm or death resulting from failing to predict, warn of, or take precautions to provide protection from the violent behavior of a mental health client or patient, only if the client or patient or a knowledgeable person has communicated to the professional or organization an explicit threat of inflicting imminent and serious physical harm to or causing the death of one or more clearly identifiable potential victims, the professional or organization has reason to believe that the client or patient has the intent and ability to carry out the threat, and the professional or organization fails to take one or more of the following actions in a timely manner:
(4) Communicate to a law enforcement agency with jurisdiction in the area where each potential victim resides, where a structure threatened by a mental health client or patient is located, or where the mental health client or patient resides, and if feasible, communicate to each potential victim or a potential victim's parent or guardian if the potential victim is a minor or has been adjudicated incompetent, all of the following information:
(C) All of the following apply when a mental health professional or organization takes one or more of the actions set forth in divisions (B)(1) to (4) of this section: