Also known as: temporally proximate · temporal proximities · close in time · temporal closeness
Written by attorneys · grounded in primary & secondary sources — see below
An analytical factor measuring the closeness in time between an unconstitutional police action and the discovery of evidence. Courts weigh this factor along with intervening circumstances and the purpose and flagrancy of the misconduct to decide whether the taint of the initial illegality has dissipated sufficiently to admit the evidence.
Officer Ramirez stopped Tracy Torres on a hunch without reasonable suspicion. Within minutes the officer learned of an outstanding warrant for an unrelated traffic offense, arrested Torres, and found drugs during the search incident to arrest. The close timing between the stop and the discovery weighed against attenuation, but the preexisting warrant and the officer's merely negligent conduct ultimately rendered the drugs admissible.
Police arrested Tyrone Tran without probable cause and questioned him at the station. Two hours later Tran gave a detailed confession. The short interval between the unlawful arrest and the statement counted against attenuation, so the confession remained inadmissible as fruit of the poisonous tree.
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An officer detained Tobias Thomas outside a suspected drug house without reasonable suspicion. Minutes later the officer discovered an outstanding warrant, arrested Thomas, and recovered methamphetamine. The brief temporal gap between the stop and the seizure weighed against attenuation yet was outweighed by the independent warrant and the officer's non-flagrant conduct.
Agents obtained an initial admission from Travis Tate through abusive tactics. The next day they secured a second statement under calmer conditions. The one-day interval between the improper interrogation and the later statement counted against attenuation, rendering the second statement inadmissible.
Laboratory analysts performed drug tests on November 28 and completed sworn affidavits on December 4. The six-day gap between the tests and the affidavits was considered in assessing whether the statements qualified as near-contemporaneous observations.
Officers arrested Tabitha Taylor without probable cause. Two hours later she confessed after receiving Miranda warnings. The short temporal proximity between the unlawful arrest and the confession weighed heavily against attenuation, so the statement was suppressed.
Close temporal proximity between the unconstitutional conduct and the discovery of evidence weighs against attenuation and favors suppression. Courts treat a gap of only minutes or a few hours as cutting strongly in favor of exclusion because the causal connection remains fresh.
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Yes. Even when temporal proximity favors suppression, discovery of a valid preexisting arrest warrant that is entirely unconnected to the illegal stop can constitute an intervening circumstance sufficient to purge the taint when combined with merely negligent police conduct.
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No mathematical weight is assigned to any factor. Temporal proximity is simply one consideration. The flagrancy of the misconduct often receives particular emphasis, and intervening circumstances can outweigh even a very short time gap.
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The three-factor attenuation test developed in Brown v. Illinois is used primarily for Fourth Amendment derivative-evidence claims. Courts apply analogous timing considerations in other areas such as employment retaliation, but the doctrinal framework differs.
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…given the evidence identified above, including: The crimes followed the same pattern and method of attack; they were relatively close in time to each other; the defendants met and discussed the attacks before and after they occurred; and many of the defendants participated directly in more than one assault. These facts, among…