Ohio Revised Code

Ohio Rev. Code § 2945.391 (2026)

Not guilty by reason of insanity finding

✓ current as of May 2026
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For purposes of sections 2945.371, 2945.40, 2945.401, and 2945.402 and Chapters 5122. and 5123. of the Revised Code, a person is "not guilty by reason of insanity" relative to a charge of an offense only as described in division (A)(14) of section 2901.01 of the Revised Code. Proof that a person's reason, at the time of the commission of an offense, was so impaired that the person did not have the ability to refrain from doing the person's act or acts, does not constitute a defense.

Notes of Decisions
Cited in 10 cases (5 in the last 5 years), 2013–2026 · leading case: State v. Ireland (Slip Opinion), 2018 Ohio 4494 (Ohio 2018).
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State v. Ireland (Slip Opinion), 2018 Ohio 4494 (Ohio 2018). · cites it 6× “” R.C. 2945.391. {¶ 62} Ireland’s claim of being in a temporarily altered state of consciousness is a typical diminished-capacity defense.”
State v. Davis, 2021 Ohio 237 (Ohio Ct. App. 2021). · cites it 3× “Glass would not be permitted to testify for the defense because diminished capacity is not a recognized defense in Ohio pursuant to R.C. 2945.391. More specifically, the court determined that Dr.”
State v. Mitchell, 2016 Ohio 7691 (Ohio Ct. App. 2016). · cites it 3× “This instruction paraphrased R.C. 2945.391, which states -15- in part: “Proof that a person’s reason, at the time of the commission of an offense, was so impaired that the person did not have the ability to refrain from doing the person’s act or acts, does not constitute a…”
State v. Metcalf, 2015 Ohio 3507 (Ohio Ct. App. 2015). “R.C. 2945.391. Accordingly, the record does not support that the trial court abused its discretion by finding that Metcalf failed to prove by clear and convincing evidence the -7- facts required to meet the conditions set forth in Crim R.”
State v. Swiger, 2013 Ohio 3519 (Ohio Ct. App. 2013). “” R.C. 2945.391. {¶13} Prior to the General Assembly’s adoption of the NGRI test set forth in R.”
State v. Moore, 2024 Ohio 994 (Ohio Ct. App. 2024). “” R.C. 2945.391. {¶ 57} When reasonable minds may reach different conclusions on the question of insanity, the question is one of fact.”
State v. Perander, 2016 Ohio 1474 (Ohio Ct. App. 2016). “Proof that a person’s reason, at the time of the commission of an -13- offense, was so impaired that the person did not have the ability to refrain from doing the person’s act or acts, does not constitute a defense.”
State v. Tussing, 2024 Ohio 5757 (Ohio Ct. App. 2024). “” R.C. 2945.391. -12- Case No. 1-24-03 2. Analysis {¶21} We find no error by the trial court.”
State v. Mundt, 2026 Ohio 382 (Ohio Ct. App. 2026). “” R.C. 2945.391. To establish a defendant is incompetent to stand trial, he must show by a preponderance of the evidence that he is incapable of understanding the nature and objective of the proceedings against him or to assist in his own defense as a consequence of a present…”
State v. Johnson, 2024 Ohio 5623 (Ohio Ct. App. 2024). “The State also observes that a finding of not guilty by reason of insanity triggers certain procedures and consequences for a defendant, which must be followed pursuant to R.C. 2945.391 and R.C. 2945.40, one of which is the potential detention of the defendant until the hearing…”
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