In his propositions of law, Wolfe asserts that the court of appeals erred in denying the writ of prohibition. In order to be entitled to a writ of prohibitiоn, Wolfe had to establish (1) that OCRC was about to exercise judicial or quasi-judicial power, (2) that the exercise of that power is unauthorized by law, and (3) that denying the 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),
Wolfe claims entitlement to extraordinary relief in prohibition because of res judicata, collateral estoppel, immunity, the law-of-the-case doctrine, and the civil service commission’s initial exercise of concurrent jurisdiction. Wolfe contends
As to Wolfe’s claims that the prior civil service appeal acted to divest OCRC of jurisdiction based upon res judicata and the included concept of collateral estoppel, res judicata is an affirmative defense which does not divest the jurisdiction of the second tribunal to decide the validity of that defense. See State ex rel. Flower v. Rocker (1977),
In addition, res judicata has no application to the proceeding before OCRC. OCRC was not named as a party to the prior civil service proceеding and did not participate in that action. OCRC was also not in privity with either Jones or the city, the parties to the civil service proceeding. Therefore, res judicata, which requires mutuality of the parties, does not operate to bar OCRC from proceeding on the unlawful discriminatory practice сharges. Broz v. Winland (1994),
Second, the issues involved in a civil service appeal before either the State Personnel Board of Review or a municipal civil service commission and an unlawful discriminatory practice charge before OCRC are different. See Cincinnati v. Dixon (1992),
Wolfe next contends that he is entitled to a writ of prohibition because of the law-of-the-case doctrine. “Absent extraordinary circumstances, such as an intervening decision by the Supreme Court, an inferior court has no discretion to disregard the mаndate of a superior court in a prior appeal in the same case.” Nolan v. Nolan (1984),
Wolfe additionally claims that the Whitehall Civil Service Commission possessed exclusive jurisdiction over the proceedings because its jurisdiction was the one initially invoked. “ ‘ “As between [state] courts of concurrent jurisdiction, the tribunal whоse power is first invoked by the institution of proper proceedings acquires jurisdiction to the exclusion of all other tribunals, to adjudicate upоn the whole issue and to settle the rights of the parties.” ’ ” State ex rel. Sellers v. Gerken (1995),
In sum, the errors raised by Wolfe do not attack the jurisdiction of OCRC, and OCRC’s exercise of quasi-judicial authority is not unauthоrized. The extraordinary remedy of prohibition may not be employed before trial on the merits, as a substitute for appeal to review mere errors or irregularities of a court having jurisdiction. State ex rel. Enyart v. O’Neill (1995),
Further, absent a patent and unambiguous lack of jurisdiction, a tribunal having general subject matter jurisdictiоn of a case possesses authority to
Wolfe’s claims that the OCRC proceeding and any appeal under R.C. 4112.06 to a common pleas court from any аdverse OCRC decision would be inadequate due to time and expense are also without merit. See State ex rel. Gillivan v. Bd. of Tax Appeals (1994),
Based on the foregoing, OCRC’s exercise of jurisdiction over the unlawful discrimination charges is appropriate and Wolfe has adequate remedies at law in the OCRC proceeding and a further appeal to common pleas court. The court of appeals properly granted summary judgment and denied the writ. Accordingly, the judgment of the court of appeals is affirmed.
Judgment affirmed.
