Implied-Consent Blood Draws in Montana Require Record Evidence of Understanding and Voluntary Consent; Good-Faith Reliance Must Be Preserved Below

1. Introduction

State v. Laroque addresses a recurring tension in DUI/drug-impaired driving investigations: Montana’s statutory “implied consent” regime versus constitutional limits on warrantless blood draws. After a fatal head-on collision in Gallatin County, officers directed a hospital blood draw from driver Lilly Laroque without a warrant. The toxicology report showed THC above the statutory limit. Laroque moved to suppress, arguing she did not (and could not) voluntarily consent and no exception to the warrant requirement applied.

The District Court suppressed the blood evidence, distinguishing City of Great Falls v. Allderdice and concluding the record did not show Laroque understood the advisory or meaningfully consented. The State appealed, reframing the case as a dispute over whether the District Court clearly erred in finding no consent. The Montana Supreme Court affirmed.

2. Summary of the Opinion

The Supreme Court affirmed suppression on a narrow appellate issue: whether the District Court’s factual finding—Laroque did not consent to the warrantless blood draw—was clearly erroneous. The Court held it was not. The record supported the District Court’s determination that Laroque was “overwhelmingly non-responsive” and that the State did not show she understood the Implied Consent Advisory or had the ability to express refusal.

The Court also declined to consider the State’s alternative “good faith doctrine” argument because it was not preserved in the trial court.

3. Analysis

3.1 Precedents Cited (and How They Shaped the Decision)

A. Standard of review and deference to trial-court factfinding

• State v. Clinkenbeard, 2025 MT 54, ¶ 5, 421 Mont. 137, 565 P.3d 1259: The Court reiterated the familiar suppression-review framework: factual findings for clear error; legal conclusions de novo. This anchoring made the appeal dispositively about deference—whether the record contained “substantial evidence” supporting the District Court.
• City of Great Falls v. Allderdice, 2017 MT 58, ¶ 8, 387 Mont. 47, 390 P.3d 954: The Court quoted Allderdice for the clear-error test and “substantial evidence” definition, reinforcing the high threshold the State had to meet to overturn the District Court’s consent findings.

B. Consent as an exception to the warrant requirement

• State v. Laster, 2021 MT 269, ¶ 10, 406 Mont. 60, 497 P.3d 224: The Court relied on Laster for the proposition that warrantless searches are per se unreasonable absent a narrow exception, framing the inquiry as whether “voluntary consent” existed.
• State v. Laster, 2021 MT 269, ¶ 40: The Court reiterated that voluntary consent is an “independent exception” under the Fourth Amendment and Article II, Section 11 of the Montana Constitution. This made “voluntariness” (a fact question) the lynchpin.
• City of Great Falls v. Allderdice, 2017 MT 58, ¶ 12: The Court adopted Allderdice’s method for implied-consent situations: evaluate the “totality of the circumstances” and uphold trial-court voluntariness findings unless clearly erroneous.
• State v. Zakovi, 2005 MT 91, ¶ 29, 326 Mont. 475, 110 P.3d 469: Cited via Allderdice to support totality-of-circumstances analysis in consent determinations, emphasizing that consent is contextual and fact-driven.

C. Implied consent generally (and why it did not decide the case by itself)

• Missouri v. McNeely, 569 U.S. 141, 161, 133 S. Ct. 1552, 1556 (2013): The Court referenced McNeely to situate implied-consent laws as a nationwide framework conditioning driving privileges on consent to testing. But the opinion’s outcome turned not on the general legitimacy of implied consent statutes, but on this record’s failure to support actual voluntary consent.
• City of Great Falls v. Allderdice (distinguished): The State’s principal reliance. In Allderdice, the driver affirmatively indicated understanding after each paragraph of the advisory, then fell silent. In Laroque, by contrast, the District Court found no indication she understood the advisory at all, and questioned whether she could physically object. That distinction—understanding and responsiveness—drove affirmance.

D. Exclusionary rule and good-faith exception (raised too late)

• United States v. Calandra, 414 U.S. 338, 348, 94 S. Ct. 613, 620 (1974): The Court invoked Calandra to describe the exclusionary rule as a judicially created deterrent remedy, not a personal constitutional right—setting up the conceptual space where a good-faith exception might apply in an appropriate case.
• United States v. Leon, 468 U.S. 897, 907-08, 104 S. Ct. 3405, 3412 (1984): Cited for the federal good-faith exception rationale. The Court nevertheless did not apply it; it declined review because the State failed to raise it below.
• Smith v. State, 2024 MT 225, ¶ 21, 418 Mont. 210, 557 P.3d 55 (quoting State v. Martinez, 2003 MT 65, ¶ 17, 314 Mont. 434, 67 P.3d 207): These cases supplied the preservation doctrine: parties cannot change legal theories on appeal. This was the direct basis to reject the State’s new good-faith argument.

E. Alternative evidentiary paths (medical records) and the “societal costs” argument

• State v. Hesser, 2024 MT 134, ¶ 11, 417 Mont. 84, 551 P.3d 277: In a footnote context, the Court suggested the State may be able to obtain equivalent evidence through an investigative subpoena for medical records under § 46-4-301(3), MCA—undercutting the State’s “societal cost” narrative for avoiding exclusion.

3.2 Legal Reasoning

A. The case was decided as a factual-deference appeal

The Court “restated the issue” narrowly: whether the District Court’s finding that Laroque did not consent was clearly erroneous. That framing mattered. It converted the State’s implied-consent theory into a demand for appellate reweighing of evidence—something the clear-error standard strongly resists.

B. Implied consent did not relieve the State of proving voluntary consent on this record

Statutory backdrop: § 61-8-1016(1)(a), (2)(a)(iii)(C), (3), MCA provides that motorists are “considered to have given consent” to drug/alcohol testing in certain circumstances; conscious motorists may refuse (with license consequences); an unconscious or “incapable of refusal” person “is considered not to have withdrawn” consent.

The State argued Laroque was conscious and simply failed to withdraw her implied consent. The Court, however, treated voluntariness as a fact question governed by totality-of-circumstances review. The District Court found (and the record supported) that:

• Laroque was largely nonresponsive after a severe collision, suggesting incapacitation rather than strategic silence.
• The State presented little evidence about any meaningful nonverbal communication indicating comprehension or choice.
• There was “no indication” she understood the Implied Consent Advisory or what was being asked.
• There was a genuine question whether she had the physical ability to object.

Given these facts, the Supreme Court held there was “substantial credible evidence” supporting the no-consent finding and no basis to be “definitely and firmly convinced” the District Court made a mistake.

C. Allderdice was not a rule that silence always equals consent

The Court accepted the District Court’s distinction: in City of Great Falls v. Allderdice, the driver repeatedly acknowledged understanding of the advisory. That evidentiary foundation allowed the trial court there to treat later silence as “passive compliance” rather than confusion or incapacity. In Laroque, the missing foundation (understanding, responsiveness, ability to refuse) made the inference of “passive compliance” unsupported.

D. Preservation doctrine ended the State’s good-faith fallback

Although the opinion describes the federal good-faith concept via United States v. Leon, the Court refused to reach the issue because the State did not raise it below. The holding is procedural but consequential: even potentially powerful suppression-avoidance arguments are forfeited when omitted in the District Court.

3.3 Impact

• Higher evidentiary burden in practice for warrantless hospital blood draws: Prosecutors and officers should expect trial courts to scrutinize whether a driver actually understood the advisory and had the capacity to refuse—particularly after severe trauma. Audio/video that captures affirmative comprehension (as in Allderdice) will matter.
• Warrants become the safer operational default: The District Court’s observation that multiple judges were available to process warrants, combined with the Supreme Court’s deference to no-consent findings, increases litigation risk when officers proceed without a warrant in hospital settings.
• Clearer boundary on “silence” cases: Laroque signals that silence/nonresponse is not automatically treated as continued implied consent where the record supports incapacity, confusion, or inability to object.
• Appellate preservation is outcome-determinative: The decision reinforces that suppression appeals must be built on the theories actually litigated below; new theories (like good faith) will not be entertained.
• Medical-record subpoena as an alternative evidentiary route: By referencing § 46-4-301(3), MCA and State v. Hesser, the Court implicitly encourages the State to consider lawful post hoc acquisition of hospital toxicology where available, reducing reliance on constitutionally vulnerable police-directed draws.

4. Complex Concepts Simplified

• “Implied consent” (Montana DUI testing): A statute treats driving on public ways as advance consent to chemical testing under specified conditions. But statutory implied consent does not eliminate constitutional scrutiny of whether the search fits a warrant exception (here, voluntary consent as a fact question).
• Voluntary consent (totality of circumstances): Consent is valid only if given freely (not coerced) and with sufficient understanding. Courts look at everything: responsiveness, clarity of advisement, physical condition, and ability to refuse.
• “Clearly erroneous” review: On appeal, factual findings stand if supported by “substantial evidence,” even if the appellate court might have weighed evidence differently. The appellant must show a serious, definite mistake.
• Exclusionary rule: A remedy that generally bars unlawfully obtained evidence to deter police misconduct. It is not, in itself, the constitutional right; it is the court’s enforcement mechanism.
• Good-faith exception: Under federal law, evidence may sometimes be admitted despite a Fourth Amendment violation if officers acted with objective good faith (often in reliance on a warrant or binding law). In Laroque, the Court did not decide whether such an exception exists or applies under the Montana Constitution because the argument was not preserved.
• Investigative subpoena for medical records (§ 46-4-301(3), MCA): A legal tool allowing the State, under statutory procedures, to seek relevant medical records—potentially including hospital-drawn blood tests—without relying on a police-directed warrantless draw.

5. Conclusion

State v. Laroque is a consent-and-proof decision more than a broad constitutional pronouncement. It confirms that, in Montana implied-consent cases, “consent” still rises or falls on the totality of circumstances and the evidentiary record—especially whether the driver understood the advisory and could meaningfully choose. Where a severely injured driver is largely nonresponsive and the State cannot show comprehension, trial courts may find no voluntary consent, and the Supreme Court will likely defer under clear-error review.

The opinion also delivers a sharp procedural lesson: suppression appeals cannot be salvaged with new theories such as “good faith doctrine” raised for the first time on appeal.