Title 18Crimes and Criminal ProcedureRelease 119-73

§3504 Litigation concerning sources of evidence

Title 18 › Part PART II— - CRIMINAL PROCEDURE › Chapter CHAPTER 223— - WITNESSES AND EVIDENCE › § 3504

Last updated Apr 6, 2026|Official source

Summary

When a party says evidence should be kept out because it was made or gotten by an unlawful act, the other party must say yes or no about whether that act happened. For alleged unlawful acts before June 19, 1968, people do not have to turn over information about the act unless it matters to a current claim. Also, you cannot claim exclusion for an event that happened more than five years after the alleged unlawful act if the act was before June 19, 1968. Unlawful act: using an electronic, mechanical, or other device in a way that breaks the Constitution, federal laws, or federal rules.

Full Legal Text

Title 18, §3504

Crimes and Criminal Procedure — Source: USLM XML via OLRC

(a)In any trial, hearing, or other proceeding in or before any court, grand jury, department, officer, agency, regulatory body, or other authority of the United States—
(1)upon a claim by a party aggrieved that evidence is inadmissible because it is the primary product of an unlawful act or because it was obtained by the exploitation of an unlawful act, the opponent of the claim shall affirm or deny the occurrence of the alleged unlawful act;
(2)disclosure of information for a determination if evidence is inadmissible because it is the primary product of an unlawful act occurring prior to June 19, 1968, or because it was obtained by the exploitation of an unlawful act occurring prior to June 19, 1968, shall not be required unless such information may be relevant to a pending claim of such inadmissibility; and
(3)no claim shall be considered that evidence of an event is inadmissible on the ground that such evidence was obtained by the exploitation of an unlawful act occurring prior to June 19, 1968, if such event occurred more than five years after such allegedly unlawful act.
(b)As used in this section “unlawful act” means any act the use of any electronic, mechanical, or other device (as defined in section 2510(5) of this title) in violation of the Constitution or laws of the United States or any regulation or standard promulgated pursuant thereto.

Legislative History

Notes & Related Subsidiaries

Statutory Notes and Related Subsidiaries

Congressional Statement of Findings Pub. L. 91–452, title VII, § 701, Oct. 15, 1970, 84 Stat. 935, provided that: “The Congress finds that claims that evidence offered in proceedings was obtained by the exploitation of unlawful acts, and is therefore inadmissible in evidence, (1) often cannot reliably be determined when such claims concern evidence of events occurring years after the allegedly unlawful act, and (2) when the allegedly unlawful act has occurred more than five years prior to the event in question, there is virtually no likelihood that the evidence offered to prove the event has been obtained by the exploitation of that allegedly unlawful act.” Applicability to Proceedings Pub. L. 91–452, title VII, § 703, Oct. 15, 1970, 84 Stat. 936, provided that: “This title [enacting this section and provisions set as notes under this section] shall apply to all proceedings, regardless of when commenced, occurring after the date of its enactment [Oct. 15, 1970]. Paragraph (3) of subsection (a) of section 3504, chapter 223, title 18, United States Code, shall not apply to any proceeding in which all information to be relied upon to establish inadmissibility was possessed by the party making such claim and adduced in such proceeding prior to such enactment.”

Reference

Citations & Metadata

Citation

18 U.S.C. § 3504

Title 18Crimes and Criminal Procedure

Last Updated

Apr 6, 2026

Release point: 119-73