Also known as: purging the primary taint · purged the primary taint · purge primary taint · purging primary taint · purge the taint · attenuation of taint · dissipate the taint
Written by attorneys · grounded in primary & secondary sources — see below
A doctrine permitting admission of evidence derived from an unconstitutional search, seizure, or pretrial identification procedure when the connection between the illegality and the evidence has become sufficiently attenuated to dissipate the taint. Courts weigh temporal proximity, intervening circumstances, and the flagrancy of official misconduct to determine whether the taint has been purged.
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Philip Powell's hotel room was entered without a warrant and a coded list of doctors was seized. Weeks later prosecutors obtained grand jury subpoenas using the list and secured prescription records. The records were admitted because the formal grand jury process and passage of time broke the causal chain from the initial entry.
Piper Patel viewed a suspect during a robbery and later made an in-court identification. An earlier lineup had been conducted without counsel. The identification was admitted after the court found her opportunity to observe the robber and her level of certainty supplied an independent source.
Pilar Pena was arrested without probable cause and taken to the station. After receiving Miranda warnings she gave a statement. The statement was admitted because the warnings and her decision to speak constituted an intervening act of free will that purged the taint of the unlawful arrest.
Patrick Phan was detained without probable cause and released after several hours. Three days later he voluntarily appeared at the station, received advice that he was free to leave, and supplied server credentials. The credentials and resulting chat logs were admitted because the voluntary return and warnings created sufficient attenuation.
Pavel Petrov was stopped without reasonable suspicion outside a bank. The officer ran his identification and discovered an outstanding warrant for an unrelated traffic matter. The cocaine found during the ensuing search incident to arrest was admitted because the valid preexisting warrant constituted an intervening circumstance that attenuated the taint.
Priya Prasad gave an initial statement during an unlawful detention. She was released and returned days later to give a second statement after receiving fresh Miranda warnings. The second statement was admitted because the release and renewed warnings supplied an independent source that purged the taint of the original illegality.
Courts examine the temporal proximity between the illegality and the discovery of evidence, the presence of intervening circumstances, and the flagrancy of the official misconduct. No single factor is dispositive and the analysis is case specific.
Supporting sources
The discovery of a valid preexisting warrant unconnected to the stop constitutes a strong intervening circumstance. When combined with at most negligent conduct and the absence of purposeful or flagrant misconduct, the warrant attenuates the taint and permits admission of evidence seized during the subsequent lawful arrest.
…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.…
…and arrested. Under such circumstances it is unreasonable to infer that Toy's response was sufficiently an act of free will to purge the primary taint of the unlawful invasion.[^maj-12] The Government also contends that Toy's declarations should be admissible because they were ostensibly exculpatory rather than incriminating. There are…
…between the lawless conduct of the police and the discovery of the challenged evidence has "become so attenuated as to dissipate the taint." ' " 435 U. S., at 273-274. It is also suprising to learn that the issues in Stone v. Powell are "distinct" from the Fourth Amendment. [^maj-5]: Consider the full context of the…
…and the giving of the statements, and that defendant’s act in making the statements was ‘sufficiently an act of free will to purge the primary taint
…warrant favors finding that the connection between unlawful conduct and the discovery of evidence is "sufficiently attenuated to dissipate the taint
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Miranda warnings by themselves do not automatically purge the taint. Courts must still consider the surrounding circumstances including temporal proximity and the flagrancy of the misconduct to decide whether the statements were the product of free will sufficiently attenuated from the initial illegality.
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A formal grand jury investigation begun weeks after the illegality, together with the use of compulsory process directed at independent third parties, can constitute intervening circumstances that dissipate the taint. The passage of time and the involvement of separate institutional actors support a finding of attenuation.
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Evidence initially observed during an unlawful entry may still be admitted if later obtained through a genuinely independent lawful avenue such as a warrant based solely on untainted information. The later warrant must rest on information wholly unconnected to the prior illegality.
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