Also known as: fruit of the poisonous tree doctrine · fruit of the poisonous tree · poisonous tree doctrine
Written by attorneys · grounded in primary & secondary sources — see below
A rule of criminal procedure that excludes evidence obtained by exploiting an initial constitutional violation. The doctrine reaches not only the direct product of an unlawful search or seizure but also any later evidence causally derived from that illegality. Courts apply the rule unless an exception such as independent source, attenuation, or inevitable discovery severs the causal chain.
Coast Guard investigators boarded Captain Luis Rivera's vessel without a warrant and seized a log listing rendezvous coordinates. Using those coordinates, agents obtained a surveillance warrant and later interdicted a vessel carrying narcotics. Rivera moves to suppress the contraband. The court grants the motion because the narcotics were obtained by exploiting the initial unlawful search.
Cultural heritage officers planted a listening device in Lena Ortiz's gallery office without a warrant and overheard plans to move paintings. Relying solely on that information, officers obtained a warrant and recovered the paintings at the storage facility. Ortiz moves to suppress the paintings. The court grants the motion because the evidence was derived directly from the unlawful surveillance.
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Federal agents installed a warrantless tracking program on Alan's home computer that revealed his cloud storage account. Agents used that data as the primary basis for a warrant to search the account and recovered stolen files. Alan moves to suppress the files. The court grants the motion because the search warrant exploited the initial unconstitutional surveillance.
Traffic officers opened the glove compartment of a dealership vehicle without consent and found Brandon Lee's notebook listing off-site storage units. Officers used the notebook to obtain a warrant and seized altered dashboards inside the units. Lee moves to suppress the dashboards. The court grants the motion because the storage-unit evidence flowed from the unlawful search.
State officers tapped GulfStream Refining's internal radio system without authorization and overheard details about concealed discharge pipes. Officers used that information to draft an affidavit and obtained a warrant to search the underground infrastructure. GulfStream moves to suppress the discovered pipes. The court grants the motion because the warrant and resulting evidence were products of the illegal interception.
Officers forcibly entered Bonnie's apartment without a warrant and seized her laptop. Three days later they obtained server access credentials from her during a voluntary interview and used those credentials to retrieve chat logs from a third-party server. Bonnie moves to suppress the logs. The court denies the motion because the voluntary disclosure after release sufficiently attenuated the taint of the initial entry.
No. The doctrine also requires exclusion of evidence later obtained by exploiting the initial illegality. Courts suppress derivative evidence unless an exception such as independent source, attenuation, or inevitable discovery applies.
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Courts examine the temporal proximity between the illegality and the discovery of the evidence, the presence of intervening circumstances, and the flagrancy of the official misconduct. When these factors show the connection has become sufficiently remote, the evidence may be admitted.
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A warrant does not automatically cleanse prior illegality. If the warrant affidavit relies on information obtained through the unconstitutional search, the resulting evidence remains fruit of the poisonous tree unless an independent source or other exception applies.
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Yes. When officers exploit an unlawful search to discover the location of evidence, that evidence is derivative and subject to suppression. The causal link must be broken by an exception such as inevitable discovery before admission is permitted.
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…discovery exception to the exclusionary rule. Williams contends that evidence of the body's location and condition is "fruit of the poisonous tree," i. e. , the "fruit" or product of Detective Leaming's plea to help the child's parents give her "a Christian burial," which this Court had already held equated to interrogation. He…