State ex rel. Koren v. Grogan

In order to obtain a writ of prohibition, relator must prove: (1) that the court or officer against whom the writ is sought is about to exercise judicial or quasi-judicial power, (2) that the exercise of that power is unauthorized by law, and (3) that denying a writ will result in injury for which no other adequate remedy exists in the ordinary course of law. State ex rel. Ruessman v. Flanagan (1992), 65 Ohio St.3d 464, 465, 605 N.E.2d 31, 33. The parties agree that the first prong of the foregoing test is met here, i.e., appellant is about to exercise judicial power over the criminal case…