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18 U.S.C. § 17

U.S. CodeFederalPositive Law
Insanity defense
About This Law
/us/usc/t18/s17
Title
18 — Crimes and Criminal Procedure
Chapter
PTI/CH1
Release
119-84
Release Date
2026-04-17

Section Text

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(a) Affirmative Defense.—It is an affirmative defense to a prosecution under any Federal statute that, at the time of the commission of the acts constituting the offense, the defendant, as a result of a severe mental disease or defect, was unable to appreciate the nature and quality or the wrongfulness of his acts. Mental disease or defect does not otherwise constitute a defense. (b) Burden of Proof.—The defendant has the burden of proving the defense of insanity by clear and convincing evidence. (Added Pub. L. 98–473, title II, § 402(a), Oct. 12, 1984, 98 Stat. 2057, § 20; renumbered § 17, Pub. L. 99–646, § 34(a), Nov. 10, 1986, 100 Stat. 3599.)

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