State highest court

Montana Supreme Court

The 40 most recent opinions analysed by CaseDiver, newest first. Each linked case has its own permanent, searchable page — those URLs stay live even after newer opinions replace them on this list.

Recent opinions

MontanaState v. J.A. Miller

September 1, 20262026 MT 208

The court affirmed Miller’s convictions, concluding that the District Court acted within its discretion in permitting uniformed law-enforcement officers to attend trial and that Miller failed to preserve his challenge to the court’s failure to poll the jury.

MontanaParenting and Adoption of A.M.S.

August 18, 20262026 MT 194

The Court affirmed the termination of T.J.S.’s parental rights and the stepparent adoption of A.M.S. It held that the District Court erred by accepting the parties’ stipulation that the Indian Child Welfare Act did not apply, but the error was harmless because the record did not provide reason to know that A.M.S.

MontanaMcnain Holdings v. Wilderness Preserve

August 18, 20262026 MT 193

The court affirmed the denial of Wilderness Preserve’s post-trial motions, concluding that substantial credible evidence supported the jury’s contract-damages award and that the verdict complied with the jury instructions.

MontanaMatter of: W.D.

August 4, 20262026 MT 177

The Montana Supreme Court held that a Youth Court exceeds its authority under § 41-5-208, MCA, when, at the conclusion of a transfer hearing, it imposes a new disposition — here a DOC commitment until age 25, an extended supervision period, and a Tier II sex-offender registration requirement.

MontanaVicevich v. Kultgen

July 28, 20262026 MT 168

The court affirmed that the Kultgens hold an express 60-foot ingress-and-egress easement benefiting Lot 4, that the easement was neither modified by the 2021 Easement Agreement nor extinguished by abandonment, and that the identified western fence unlawfully obstructed access.

MontanaState v. Wilson

July 28, 20262026 MT 165

The Montana Supreme Court reversed the First Judicial District Court's grant of summary judgment in favor of the State of Montana in an interpleader action. The State, as the alleged tortfeasor through its employee Jose Ruiz, had filed a petition in interpleader and complaint for declaratory relief seeking to deposit…

MontanaState v. Veltkamp

July 28, 20262026 MT 169

The Montana Supreme Court affirmed Willie Veltkamp's convictions for two counts of felony incest following a jury trial. The Court held that the narrative statements in the SANE Report were erroneously admitted under the medical-diagnosis hearsay exception (an error the State conceded) and that submitting the report…

MontanaState v. Morrissey Jr.

July 28, 20262026 MT 167

The Montana Supreme Court affirmed Robert Lee Morrissey Jr.'s convictions for three counts of felony sexual assault, rejecting his contention that the evidence was insufficient to support Count I, the third ('standing') incident.

MontanaState v. Martinez

July 28, 20262026 MT 166

The Montana Supreme Court reversed Allen Martinez's misdemeanor criminal mischief conviction for spitting inside a highway patrol vehicle, holding the State presented no evidence his spit 'injured, damaged, or destroyed' the vehicle under § 45-6-101(1)(a), MCA, because it caused no physical harm, loss, substantial…

MontanaState v. K. Proctor

July 14, 20262026 MT 150

The Court upheld Proctor’s conviction after concluding that the district court properly admitted testimony concerning nonaccidental trauma under Montana’s expert-evidence framework.

MontanaParenting of C.R.J.

July 14, 20262026 MT 151

The Court affirmed a discovery sanction limiting the mother's counselor's testimony about treatment and records created after the parenting evaluator's report. It held that the mother's deliberate failure to produce current mental-health records, despite discovery obligations and a court-approved stipulation, caused…

MontanaTuma v. Britt

July 7, 20262026 MT 144

The Court affirmed partial summary judgment determining that the Second Lease Amendment was ambiguous about whether it removed both purchase options in Section 5 of the original lease or only the fee-simple option.

MontanaState v. K. Morris

July 7, 20262026 MT 143

The court affirmed the exclusion of evidence concerning the victim’s prior sexual history and alleged infidelity, upheld the discovery sanction barring undisclosed investigator notes, and rejected the challenge to the evidentiary rulings.

MontanaState v. A. Twardoski

July 7, 20262026 MT 142

The Court affirmed Twardoski’s convictions and sentence. It declined to review his ineffective-assistance claim on direct appeal because the record did not explain counsel’s failure to object and supported plausible tactical justifications.

MontanaMarriage of DeCock

July 7, 20262026 MT 145

The Court affirmed the deemed denial of Taralyn DeCock’s Rule 60(b)(6) motion seeking relief from the dissolution decree. It held that the motion improperly attempted to relitigate the previously rejected challenge to the marital property agreement and that Taralyn independently failed to show that she was blameless…

MontanaBurtons v. Flathead Conservation Dist.

July 7, 20262026 MT 147

The Court affirmed summary judgment upholding the Conservation District’s denial of the Burtons’ permit application. It held that the proposed dredging and berm project fell within the District’s jurisdiction because the historically modified pond and channel were connected to the Flathead River and the project could…

MontanaState v. T. Hagberg

June 30, 20262026 MT 135

The court held that Hagberg did not waive appellate review of the $5,000 fine by agreeing to it in his plea agreement and at sentencing. It affirmed the statutory fine but vacated the portion of the judgment addressing the fine and remanded for the District Court to make appropriate ability-to-pay findings before…

MontanaState v. L. Johnson

June 30, 20262026 MT 138N

The Court affirmed Johnson’s misdemeanor conviction after concluding that officers had particularized suspicion to initiate the traffic stop and expand it into a DUI investigation.

MontanaParenting of A.M.G.

June 30, 20262026 MT 140N

The court affirmed the denial of Arrington’s request to relocate A.M.G. to Idaho and the resulting parenting-plan modification placing A.M.G. primarily with Father if the move occurred.

MontanaParenting of A.L.W.

June 30, 20262026 MT 139N

The Court affirmed the denial of Arrington’s request to relocate with the child to Idaho and the adoption of a parenting plan placing the child primarily with Father if the move occurred.

MontanaMcCaul v. Wells Fargo Bank

June 30, 20262026 MT 137N

The Supreme Court of Montana affirmed dismissal with prejudice of McCaul’s amended complaint under Rule 12(b)(6). It held that McCaul could not prosecute contract claims belonging to his business entities, failed to plead viable whistleblower, False Claims Act, or abuse-related claims, and filed any other potential…

MontanaLorenz v. Williams

June 30, 20262026 MT 141N

The Court affirmed the District Court’s dismissal of Williams’s Montana Consumer Protection Act claim and its limitation of negligence damages to $35,000 for patio-related repairs.

MontanaEstate of Pfeifer-Murphy

June 30, 20262026 MT 136

The Court held that the Idaho court lacked personal jurisdiction over the Cook-Reynolds Partnership because Gerald Cook was not authorized to appear for or bind the Partnership and the Partnership lacked sufficient contacts with Idaho.

The Montana Supreme Court affirmed summary judgment for Cenex, holding that the easement language unambiguously authorized Cenex to bury and use a fiber optic cable without limiting its use to pipeline operation or monitoring and permitted assignment of easement rights.