State v. Mabberly, 2019 Ohio 891

Defendant Jerry A. Mabberly was indicted on seven counts: four counts of rape of a person under 13 (first-degree felonies) and two counts of unlawful sexual conduct with a minor (third-degree felonies); one count was nolled and six went to the jury.
Victim was the daughter of defendant’s former girlfriend; she testified to multiple instances of sexual conduct, several occurring before age 13.
The State presented the victim, her mother, a treating psychologist, and a examining gynecologist; defense presented a forensic psychologist challenging interview reliability and four character witnesses.
Before trial the court drafted and proposed a nonstandard jury instruction on the fallibility of human memory; the State objected and the court nonetheless delivered a detailed memory instruction to the jury and held a consulting deposition with a memory expert.
Trial court also permitted the defense to call an expert on memory; the jury convicted; defendant appealed raising sufficiency/weight, ineffective assistance (two claims), and alleged prejudicial jury instruction; the State cross-appealed arguing the memory instruction was an abuse of discretion.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Sufficiency / Weight of the evidence	State: victim’s testimony and corroborating evidence suffice to convict	Mabberly: evidence insufficient and verdict against weight of evidence	Court: evidence sufficient; verdict not against manifest weight — overrules these claims
Ineffective assistance — State expert testimony	State: expert testimony was proper and did not vouch for truth	Mabberly: counsel ineffective for not objecting to expert allegedly bolstering victim credibility	Court: expert avoided direct veracity opinion; objection would likely fail; no prejudice shown; claim denied
Ineffective assistance — voir dire remarks	State: voir dire may mention basic case facts to screen jurors	Mabberly: counsel ineffective for not objecting to State outlining facts in voir dire	Court: remarks were basic and permissible; counsel’s failure to object not prejudicial; claim denied
Jury instruction on memory (cross-appeal)	State: instruction biased, advocated mistrust of memory, and was improper	Mabberly: defended instruction; argued labels for counts could imply settled guilt	Court: trial court abused discretion — instruction was vague, overbroad, and advocacy-like; use alongside defense expert risked undue emphasis; but no relief granted to State on outcome

State v. Smith, 80 Ohio St.3d 89 (1997) (standard for sufficiency review)
State v. Jenks, 61 Ohio St.3d 259 (1991) (definition of sufficiency—rational trier of fact standard)
State v. Thompkins, 78 Ohio St.3d 380 (1997) (manifest weight standard and "thirteenth juror" review)
Strickland v. Washington, 466 U.S. 668 (1984) (two‑pronged ineffective-assistance standard)
State v. Stowers, 81 Ohio St.3d 260 (1998) (permitting expert opinion on ultimate issue of abuse without directly vouching for veracity)
Manson v. Brathwaite, 432 U.S. 98 (1977) (test for evaluating eyewitness identification reliability)
Sparf v. United States, 156 U.S. 51 (1895) (judicial role in instructing juries and separation of functions)