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Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-06 10:51:44 -04:00

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LegalText 18 U.S.C. § 4242 Determination of the existence of insanity at the time of the offense us united_states_code code_section 18 CRIMES AND CRIMINAL PROCEDURE 313 OFFENDERS WITH MENTAL DISEASE OR DEFECT 4242 18 U.S.C. § 4242 current 119-100 2026-06-26 official https://uscode.house.gov/download/releasepoints/us/pl/119/100/xml_usc18@119-100.zip /us/usc/t18/s4242 data/legal/raw/us/code/title-18/usc18.xml ca169cea6f7f742ac185ad875f847c98a29d95120b20de170e63dc2cb43e1f7d 1a1bbbbdb59e376ada4eb7ad1056fd68d396679ee7ab59f0561af15006122708 403e6e3de8a78de44e49362494b393465ec9a23e24f437be4fa1d875066949e6 2026-07-04 official
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18 U.S.C. § 4242 - Determination of the existence of insanity at the time of the offense

Text

(a) Motion for Pretrial Psychiatric or Psychological Examination.— Upon the filing of a notice, as provided in Rule 12.2 of the Federal Rules of Criminal Procedure, that the defendant intends to rely on the defense of insanity, the court, upon motion of the attorney for the Government, shall order that a psychiatric or psychological examination of the defendant be conducted, and that a psychiatric or psychological report be filed with the court, pursuant to the provisions of section 4247(b) and (c).

(b) Special Verdict.— If the issue of insanity is raised by notice as provided in Rule 12.2 of the Federal Rules of Criminal Procedure on motion of the defendant or of the attorney for the Government, or on the courts own motion, the jury shall be instructed to find, or, in the event of a nonjury trial, the court shall find the defendant—

(1) guilty;

(2) not guilty; or

(3) not guilty only by reason of insanity.

(June 25, 1948, ch. 645, 62 Stat. 855; Pub. L. 98473, title II, § 403(a), Oct. 12, 1984, 98 Stat. 2059.)

Notes

Historical and Revision NotesBased on title 18, U.S.C., 1940 ed., § 877 (May 13, 1930, ch. 254, § 7, 46 Stat. 272). Minor change was made in phraseology.

Editorial Notes

Amendments1984—Pub. L. 98473 amended section generally, substituting “Determination of the existence of insanity at the time of the offense” for “Retransfer upon recovery” in section catchline, and substituting provisions relating to motion for pretrial psychiatric or psychological examination, and special verdict, for provisions relating to retransfer to a penal or correctional institution upon recovery of an inmate of the United States hospital for defective delinquents.