Also known as:purge the taint · purged the taint · purges the taint · taint attenuation
Written by attorneys · grounded in primary & secondary sources — see below
A doctrine under which derivative evidence obtained after an unconstitutional search, seizure, or identification procedure becomes admissible when intervening circumstances sufficiently break the causal chain to the initial violation. Courts weigh temporal proximity, intervening events, and the flagrancy of official misconduct to decide whether the taint has dissipated.
Sources & Authorities
How it applies
Common Examples
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Witness Identifies Suspect in Court
Pamela Phillips glimpsed the robber for several seconds under bright lights during a bank holdup and later picked Philip Powell from a suggestive lineup. At trial she again identified Powell with high certainty. The court admitted the in-court identification after finding that her original opportunity to view the culprit, the accuracy of her description, and the short time between crime and confrontation supplied an independent source that purged the taint of the unlawful lineup.
Voluntary Confession After Release
Federal agents detained Diego without probable cause on a factory floor. Two days after his release, Diego returned voluntarily with counsel, received Miranda warnings, and signed a detailed confession naming a storage unit. The court held that the passage of time, Diego's release, his counseled return, and the warnings constituted intervening circumstances that purged the taint of the initial unlawful detention, rendering the confession and the seized parts admissible.
Select any source to read its text and confirm it supports the definition.
Cases
Course Outlines
Warrant Discovered During Stop
Transit officers stopped Luis without suspicion in a loading zone. While running his name they discovered a preexisting warrant for unpaid tickets, arrested him, and found firearms during an inventory. The court ruled that the valid preexisting warrant was an intervening circumstance that, together with the officers' merely negligent conduct, purged the taint of the unlawful stop and made the firearms admissible.
Second Statement After Illegal Arrest
Officers arrested Patrick Phan without probable cause and obtained an initial statement within two hours. After Phan was released and several days passed, he returned to the station, received fresh warnings, and gave a second detailed statement. The court found the second statement admissible because the significant time gap and intervening release constituted events that purged the taint of the unlawful arrest.
Attorney Call Not Disclosed
Police arrested Phoebe Park and questioned her without informing her that her attorney had called. Park waived her rights and confessed. The court held that events unknown to the suspect and occurring outside her presence had no bearing on the voluntariness of her waiver, so the failure to disclose the call did not prevent the confession from purging any prior taint.
Knock-and-Announce Violation
Officers entered Paul Peterson's home to execute a search warrant but failed to knock and announce. They seized evidence inside. The court admitted the evidence, ruling that the knock-and-announce violation did not require suppression because the evidence was not obtained by exploiting the manner of entry and the taint, if any, had been purged by the lawful warrant.
Common questions
Frequently Asked
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What three factors do courts examine to decide whether the taint has been purged?+
Courts examine the temporal proximity between the illegality and the discovery of evidence, the presence of intervening circumstances, and the purpose and flagrancy of the official misconduct. These factors determine whether the causal connection has become sufficiently attenuated.
Supporting sources
Does the discovery of a valid preexisting warrant always purge the taint of an unlawful stop?+
The discovery of a valid preexisting warrant is a strong intervening circumstance that often purges the taint when the officer's conduct was merely negligent and not flagrant. Courts still weigh temporal proximity and flagrancy before deciding admissibility.
Supporting sources
Can a later voluntary confession purge the taint of an earlier unlawful detention?+
Yes. When a suspect is released, significant time passes, and the suspect returns voluntarily with counsel and receives proper warnings, those intervening circumstances can purge the taint so that the confession and evidence derived from it become admissible.
Supporting sources
Does a later search warrant automatically purge the taint of an earlier unlawful search?+
No. A later warrant purges the taint only if it rests on information wholly independent of the illegality. When the warrant affidavit relies solely on facts obtained through the prior violation, the resulting evidence remains tainted.
Supporting sources
547 U.S. 586 (2006)Criminal Procedure
…of any taint' arising from the entry"). As noted, there is no such independent event, or intervening chain of events that would purge the taint of the illegal entry, present here. See supra , at 618. The search that produced the relevant evidence here is the very search that the knock-and-announce violation rendered unlawful.…
Criminal Law Constitutional ProtectionsConstitutional protections of accused persons · Arrest, search, and seizure [Fourth Amendment]NEXTGENFoundational