State v. Clemons, 2017 Ohio 7980

Defendant Timmie Clemons was indicted for one count of child endangering after his 13‑year‑old daughter (D.C.) was hospitalized following an alleged beating on Feb. 6, 2016; a jury convicted him and the court sentenced him to four years.
At trial D.C. testified about the charged incident (punching, thrown into table, hit with/struggle over a hammer, swollen/shut eye).
On cross‑objection the trial court allowed D.C. to recount a prior incident in which Clemons allegedly punched her repeatedly; the state argued the testimony showed a pattern and rebutted mistake.
Clemons testified he did not beat D.C.; he described a struggle in which D.C. struck her head and swung a hammer, and he sustained that injuries resulted from the struggle.
The jury convicted; on appeal Clemons argued (1) the trial court erred by admitting other‑acts evidence in violation of Evid.R. 404(B), and (2) the conviction was against the manifest weight of the evidence.

Issue	State's Argument	Clemons' Argument	Held
Whether trial court erred by admitting D.C.'s testimony about prior assaults (other‑acts) under Evid.R. 404(B)	Testimony showed a pattern of abuse and was admissible to rebut Clemons' claim of mistake/accident	Testimony was impermissible other‑acts evidence offered to show propensity/conformity	Court held admission was an abuse of discretion and prejudicial; reversal and new trial ordered
Whether error was harmless or whether remaining evidence proved guilt beyond reasonable doubt	Any error was harmless because other evidence overwhelmingly supported guilt	Error was prejudicial and undermined verdict reliability	Court held error was not harmless beyond a reasonable doubt; remaining evidence did not independently establish guilt
Whether manifest‑weight challenge requires relief given other‑acts error	(Not separately argued beyond harmlessness)	Clemons argued conviction was against the weight of the evidence	Court found assignment moot after granting new trial due to Evid.R. 404(B) error

State v. Williams, 983 N.E.2d 1278 (Ohio 2012) (sets three‑step Evid.R. 404(B) analysis: relevance, proper purpose, and balancing under Evid.R. 403)
State v. Diar, 900 N.E.2d 565 (Ohio 2008) (discusses trial court discretion in admitting other‑acts evidence)
State v. Morris, 24 N.E.3d 1153 (Ohio 2014) (harmless‑error framework for erroneous admission of evidence; impact on verdict and whether error is harmless beyond a reasonable doubt)
State v. Harris, 28 N.E.3d 1256 (Ohio 2015) (summarizes Morris harmless‑error analysis for appellate review)
State v. Curry, 330 N.E.2d 720 (Ohio 1975) (recognizes the high prejudice risk from admitting other‑acts evidence)