State ex rel. Jackson v. Ambrose (Slip Opinion), 90 N.E.3d 922

Theodore R. Jackson was convicted of aggravated robbery in Cuyahoga Cty. Common Pleas Court in June 1981 and unsuccessfully appealed and sought postconviction relief in the 1980s.
In December 2015 and January 2016 Jackson challenged the validity/authenticity of the sentencing record, claiming he never received a sentencing hearing and that the sentencing journal entry lacked judge signature and clerk stamp.
The Eighth District rejected those challenges in consolidated appeals (Jackson III), finding the sentencing entry valid and the presumption of regularity unrebutted.
In June 2016 Jackson filed an original-action petition in the Eighth District seeking writs of mandamus and prohibition against Judge Dick Ambrose (and later Clerk Nailah Byrd), reiterating that no verdict or sentence was ever pronounced and seeking vacatur and prevention of enforcement.
Judge Ambrose and the clerk moved for summary judgment, submitting certified jury-verdict and sentencing journal entries dated June 1981; the court of appeals granted summary judgment, denying the writs as unnecessary or improper for sentencing errors and citing res judicata.
This Court affirmed the court of appeals: Jackson’s claims were precluded or meritless, the record shows a verdict and valid sentencing entry, and extraordinary writs were not available to remedy alleged sentencing errors.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether mandamus can compel Judge Ambrose to vacate conviction/sentence	Jackson: No sentence was ever pronounced; sentencing entry is inauthentic, so judgment is void	Ambrose: Sentencing occurred; sentencing errors don’t void jurisdiction; mandamus not appropriate	Mandamus denied; sentencing errors not remedied by extraordinary writs
Whether prohibition can bar enforcement of sentence	Jackson: Prohibition needed because no valid sentence exists to enforce	Ambrose: Prohibition not proper; court retained jurisdiction despite alleged sentencing errors	Prohibition denied; sentencing errors don’t strip court of jurisdiction
Whether res judicata/record authenticity forecloses relitigation	Jackson: Transcript shows jurors excused before verdict; entry is unauthentic	Ambrose/Clerk: Prior appeals affirmed the entry; certified entries and docket reflect verdict	Claims precluded or disproved by record; summary judgment proper

Grava v. Parkman Twp., 73 Ohio St.3d 379 (res judicata principles governing claim and issue preclusion)
Brown v. Dayton, 89 Ohio St.3d 245 (privity and mutuality of interest for preclusion)
Temple v. Wean United, Inc., 50 Ohio St.2d 317 (summary-judgment standard)
Byrd v. Smith, 110 Ohio St.3d 24 (movant’s burden on summary judgment)
Brooks v. Kelly, 144 Ohio St.3d 322 (final judgment as bar to subsequent action)