inevitable discovery doctrine in Idaho

2026The goal of the inevitable discovery exception is to put “police in the same, not a worse, position that they would have been in if no police error or misconduct had occurred . . . .” Id. at 443 (emphasis added); see also Murray, 487 U.S. 533 .

2025The inevitable discovery doctrine is an exception to the exclusionary rule that was established by the United States Supreme Court in Nix v. Williams, 467 U.S. 431, 444 (1984) and adopted by the Idaho Supreme Court in Stuart v. State, 136 Idaho 490, 497-99 , 36 P.3d 1278, 1285-87 (2001).

2026We again stress the astute observation of our Court of Appeals: ‘The inevitable discovery doctrine ‘is not intended to swallow the exclusionary rule whole by substituting what the police should have done for what they really did.’ Id. (quoting State v. Holman, 109 Idaho 382, 392 , 707 P.2d 493, 503 (Ct. App. 1985)) (internal quotation marks and alterations omitted).

2026We again stress the astute observation of our Court of Appeals: ‘The inevitable discovery doctrine ‘is not intended to swallow the exclusionary rule whole by substituting what the police should have done for what they really did.’ Id. (quoting State v. Holman, 109 Idaho 382, 392 , 707 P.2d 493, 503 (Ct. App. 1985)) (internal quotation marks and alterations omitted).

2025The inevitable discovery doctrine is an exception to the exclusionary rule that was established by the United States Supreme Court in Nix v. Williams, 467 U.S. 431, 444 (1984) and adopted by the Idaho Supreme Court in Stuart v. State, 136 Idaho 490, 497-99 , 36 P.3d 1278, 1285-87 (2001).

2025The inevitable discovery doctrine is an exception to the exclusionary rule that was established by the United States Supreme Court in Nix v. Williams, 467 U.S. 431, 444 (1984) and adopted by the Idaho Supreme Court in Stuart v. State, 136 Idaho 490, 497-99 , 36 P.3d 1278, 1285-87 (2001).

2025Id. 3 Palmer does not appeal the district court’s holding that, even if the vehicle impoundment was unreasonable because it preceded his arrest, the evidence found in the vehicle would still be admissible under the inevitable discovery doctrine.

2022We now address the only exclusionary rule exception that the State proffered below— that Vivian’s statements were admissible under the inevitable discovery doctrine. “[T]he inevitable discovery doctrine applies when a preponderance of the evidence demonstrates that the evidence discovered pursuant to an unlawful search or seizure would have inevitably been discovered by lawful methods.” State v. Rowland, 158 Idaho 784, 787 , 352 P.3d 506 , 509 6 (Ct. App. 2015).

2026After Nix, the Supreme Court once again examined the inevitable discovery doctrine in Murray v. United States, 487 U.S. 533 (1988).

2026There, the Supreme Court clarified the reasoning behind the inevitable discovery doctrine: “Since the tainted evidence would be admissible if in fact discovered through an independent source, it should be admissible if it inevitably would have been discovered.” Id. at 539 (emphasis omitted).

2026First, the court noted in a footnote that “the inevitable discovery doctrine also does not assist the State here . . . .” This was based on the court’s interpretation of State v. Maxim, 165 Idaho 901 , 454 P.3d 543 (2019), and State v. Downing, 163 Idaho 26 , 407 P.3d 1285 (2017), which led it to reject inevitable discovery because “there is no indication that there was a parallel path by which the drug evidence would have been discovered, apart from [the trooper’s] encounter with [Campbell].” Yet later, while discussing the State’s attenuation theory, the court made an apparently inconsistent

2026First, the court noted in a footnote that “the inevitable discovery doctrine also does not assist the State here . . . .” This was based on the court’s interpretation of State v. Maxim, 165 Idaho 901 , 454 P.3d 543 (2019), and State v. Downing, 163 Idaho 26 , 407 P.3d 1285 (2017), which led it to reject inevitable discovery because “there is no indication that there was a parallel path by which the drug evidence would have been discovered, apart from [the trooper’s] encounter with [Campbell].” Yet later, while discussing the State’s attenuation theory, the court made an apparently inconsistent

2020State v. Bunting, 142 Idaho 908, 915 , 136 P.3d 379, 386 (Ct. App. 2006).

2020State v. Bunting, 142 Idaho 908, 915 , 136 P.3d 379, 386 (Ct. App. 2006).

2015The Court later expanded on the reasoning of the inevitable discovery doctrine, explaining that it was simply an extrapolation of the independent source doctrine, stating that “since the tainted evidence would be admissible if in fact discovered through an independent source, it should be admissible if it inevitably would have been discovered.” Murray v. United States, 487 U.S. 533, 539 , 108 S.Ct. 2529, 2534 , 101 L.Ed.2d 472, 481-82 (1988); see also State v. Cook, 106 Idaho 209, 222 , 677 P.2d 522, 535 (Ct.App.1984) (Burnett, J., joined by Walters, C.J., specially concurring) (noting that th

2015The Court later expanded on the reasoning of the inevitable discovery doctrine, explaining that it was simply an extrapolation of the independent source doctrine, stating that “since the tainted evidence would be admissible if in fact discovered through an independent source, it should be admissible if it inevitably would have been discovered.” Murray v. United States, 487 U.S. 533, 539 , 108 S.Ct. 2529, 2534 , 101 L.Ed.2d 472, 481-82 (1988); see also State v. Cook, 106 Idaho 209, 222 , 677 P.2d 522, 535 (Ct.App.1984) (Burnett, J., joined by Walters, C.J., specially concurring) (noting that th

2026On this point, the district court added a footnote to its decision, stating: “The inevitable discovery doctrine also does not assist the State here since there is no indication that there was a parallel path by which the drug evidence would have been discovered, apart from [the trooper]’s encounter with [Campbell].” While acknowledging that these factors “favor[ed] suppression,” the district court determined that the evidence was still admissible under the attenuation doctrine, which permits evidence where the “connection between unconstitutional police conduct and the evidence is remote or ha

2024On this point, the district court added a footnote to its decision, stating: “The inevitable discovery doctrine also does not assist the State here since there is no indication that there was a parallel path by which the drug evidence would have been discovered, apart from Trooper Weinstein’s encounter with the defendant.” While acknowledging that these factors “favor[ed] suppression,” the district court determined that the evidence was still admissible under the attenuation doctrine, which permits evidence where the “connection between unconstitutional police conduct and the evidence is remot

2025State v. Atkinson, 128 Idaho 559, 561 , 916 P.2d 1284, 1286 (Ct. App. 1996).

2025State v. Atkinson, 128 Idaho 559, 561 , 916 P.2d 1284, 1286 (Ct. App. 1996).

2022Wong Sun v. United States, 371 U.S. 471, 485 (1963).

2001Attenuated Basis Exception In Wong Sun v. United States, 371 U.S. 471 , 83 S.Ct. 407 , 9 L.Ed.2d 441 (1963), the United States Supreme Court established the attenuated basis exception to the exclusionary rule.

2025In that context, “the ultimate question is whether ‘the remaining information presented to the magistrate, after the tainted evidence is excluded, contains adequate facts from which the magistrate could have concluded that probable cause existed for issuance of the search warrant.’” State v. Smith, 168 Idaho 463, 475 , 483 P.3d 1006, 1018 (2021) (quoting State v. Revenaugh, 133 Idaho 774, 779 , 992 P.2d 769, 774 (1999)).

2025In that context, “the ultimate question is whether ‘the remaining information presented to the magistrate, after the tainted evidence is excluded, contains adequate facts from which the magistrate could have concluded that probable cause existed for issuance of the search warrant.’” State v. Smith, 168 Idaho 463, 475 , 483 P.3d 1006, 1018 (2021) (quoting State v. Revenaugh, 133 Idaho 774, 779 , 992 P.2d 769, 774 (1999)).

2025In that context, “the ultimate question is whether ‘the remaining information presented to the magistrate, after the tainted evidence is excluded, contains adequate facts from which the magistrate could have concluded that probable cause existed for issuance of the search warrant.’” State v. Smith, 168 Idaho 463, 475 , 483 P.3d 1006, 1018 (2021) (quoting State v. Revenaugh, 133 Idaho 774, 779 , 992 P.2d 769, 774 (1999)).

2025In that context, “the ultimate question is whether ‘the remaining information presented to the magistrate, after the tainted evidence is excluded, contains adequate facts from which the magistrate could have concluded that probable cause existed for issuance of the search warrant.’” State v. Smith, 168 Idaho 463, 475 , 483 P.3d 1006, 1018 (2021) (quoting State v. Revenaugh, 133 Idaho 774, 779 , 992 P.2d 769, 774 (1999)).

2013See State v. Buterbaugh, 138 Idaho 96, 101 , 57 P.3d 10 807, 812 (Ct. App. 2002).

2006Buterbaugh, 138 Idaho at 102 , 57 P.3d at 813 .

2026Although Campbell and the amicus argue that their view of the inevitable discovery exception—that an independent, parallel investigation is always required—is settled law, “[w]hether an independent line of investigation is required for the inevitable discovery exception to apply is a question that has divided the circuits.” United States v. Kennedy, 61 F.3d 494, 498 (6th Cir. 1995).

2026Thus, in these circuits, there are two instances in which the inevitable discovery doctrine applies: “when the government can demonstrate either the existence of an independent, untainted investigation . . . or other compelling facts establishing that the disputed evidence inevitably would have been discovered.” Kennedy, 61 F.3d at 499 .

2026However, the facts in the record must be sufficient to justify a “comprehensive definition” of the inevitable discovery doctrine, and the “doctrine is best developed on a case by case basis.” Id.; see also United States v. Thomas, 955 F.2d 207 , 210–11 (4th Cir. 1992) (adopting Boatwright).

2026However, the facts in the record must be sufficient to justify a “comprehensive definition” of the inevitable discovery doctrine, and the “doctrine is best developed on a case by case basis.” Id.; see also United States v. Thomas, 955 F.2d 207 , 210–11 (4th Cir. 1992) (adopting Boatwright).

2026These circuits impose two requirements for the inevitable discovery doctrine to apply: “(1) there is a reasonable probability that the contested evidence would have been discovered by lawful means in the absence of police misconduct and (2) the Government was actively pursuing a substantial alternate line of investigation at the time of the constitutional violation.” Jackson, 596 F.3d at 241 ; accord Conner, 127 F.3d at 667 ; Eng, 971 F.2d at 859; Satterfield, 743 F.2d at 846 .

2026These circuits impose two requirements for the inevitable discovery doctrine to apply: “(1) there is a reasonable probability that the contested evidence would have been discovered by lawful means in the absence of police misconduct and (2) the Government was actively pursuing a substantial alternate line of investigation at the time of the constitutional violation.” Jackson, 596 F.3d at 241 ; accord Conner, 127 F.3d at 667 ; Eng, 971 F.2d at 859; Satterfield, 743 F.2d at 846 .

2026While this Court has explained that it is not bound by erroneous legal rulings, Hooley v. State, 172 Idaho 906 , 914, 537 P.3d 1267, 1275 (2023), proper preservation of a legal theory is required for this Court to affirm based on the right result-wrong theory rule.

2025State v. Rodriguez, 174 Idaho 712 , 720, 559 P.3d 1199, 1207 (2024).

2022Contrary to the inevitable discovery rule, the State’s argument substitutes what the police should have done for what they actually did and has the effect of “swallow[ing] the exclusionary rule whole.” See id. at 909, 454 P.3d at 551 (observing inevitable discovery doctrine not intended to swallow exclusionary rule by substituting what police should have done); see also Amstutz, 169 Idaho at 150, 492 P.3d at 1109 (noting “[a]n officer’s subsequent discovery of facts that would have permitted a felony arrest” does not “retroactively justify” an initial arrest made without probable cause).

2022Contrary to the inevitable discovery rule, the State’s argument substitutes what the police should have done for what they actually did and has the effect of “swallow[ing] the exclusionary rule whole.” See id. at 909, 454 P.3d at 551 (observing inevitable discovery doctrine not intended to swallow exclusionary rule by substituting what police should have done); see also Amstutz, 169 Idaho at 150, 492 P.3d at 1109 (noting “[a]n officer’s subsequent discovery of facts that would have permitted a felony arrest” does not “retroactively justify” an initial arrest made without probable cause).

2022See State v. McClain, 862 N.W.2d 717, 725 (Minn. Ct. App. 2015) (holding the “inevitable-discovery doctrine does not apply to statements obtained after an unlawful search.”); United States v. Vasquez De Reyes, 149 F.3d 192 , 195–196 (3d Cir.1998) (holding the inevitable discovery exception did not apply to the defendant’s statements); United States v. Polanco, 93 F.3d 555, 562 (9th Cir. 1996) (holding the inevitable discovery exception does not apply to the admission of unconstitutional inculpatory statements).

2022See State v. McClain, 862 N.W.2d 717, 725 (Minn. Ct. App. 2015) (holding the “inevitable-discovery doctrine does not apply to statements obtained after an unlawful search.”); United States v. Vasquez De Reyes, 149 F.3d 192 , 195–196 (3d Cir.1998) (holding the inevitable discovery exception did not apply to the defendant’s statements); United States v. Polanco, 93 F.3d 555, 562 (9th Cir. 1996) (holding the inevitable discovery exception does not apply to the admission of unconstitutional inculpatory statements).