Background
Mark Andrew Partridge was charged with sexual intercourse without consent by accountability for conduct occurring between April and September 2019. The charging documents, plea agreement, and sentencing submissions cited the 2019 version of Montana’s governing statute, which increased the mandatory minimum period of parole ineligibility from 10 years to 25 years. That amendment did not take effect until October 1, 2019.
The District Court sentenced Partridge to 100 years in Montana State Prison, with 40 years suspended, and imposed a 25-year parole restriction. At sentencing, the court repeatedly stated that it was bound by the Legislature to impose that restriction. Neither the court nor the parties recognized that the 2017 statute, which required a 10-year minimum restriction, governed the offense.
On appeal, Partridge asserted an ex post facto violation, ineffective assistance of counsel, an involuntary plea, and an unenforceable plea agreement. He sought plea withdrawal, direct reduction of the parole restriction to 10 years, or resentencing under the correct statute.
The Court’s Holding
The Montana Supreme Court exercised common-law plain error review even though Partridge had not requested it and had not preserved the sentencing objection below. Applying a statute that increased punishment after the charged conduct implicated his fundamental right to be sentenced according to the law in effect when the offense occurred. The court concluded that leaving the error uncorrected would compromise the integrity of the judicial process.
Although the 25-year restriction was not facially illegal because the District Court possessed general authority to restrict parole for as long as the full prison term, the sentencing record showed that the court incorrectly believed the later statute required a 25-year minimum. That mistaken legal premise affected the court’s exercise of discretion.
The Supreme Court reversed Partridge’s sentence and remanded for resentencing under the 2017 statute. It did not order a 10-year restriction, instead directing the District Court to exercise its lawful discretion under the correct statutory framework. Because resentencing resolved the appeal, the court did not address Partridge’s remaining claims.
Key Takeaways
- The sentencing statute in effect when the offense occurred governed, so the amendment effective October 1, 2019, could not supply the mandatory minimum parole restriction for conduct occurring earlier that year.
- A sentence within the court’s general statutory authority may still require reversal when the sentencing judge exercised discretion under an incorrect legal premise.
- The Montana Supreme Court may use plain error review to correct an unpreserved sentencing error that implicates fundamental rights and threatens the integrity of the judicial process.
Why It Matters
The decision distinguishes between a facially unauthorized sentence and a sentence reached through an unlawful process. Even when a judge could impose the same parole restriction as a discretionary matter, resentencing is required if the record shows the judge mistakenly treated that restriction as mandatory under a later-enacted statute.
The ruling is a noncitable memorandum opinion and does not serve as precedent under the Montana Supreme Court’s internal operating rules. It nevertheless illustrates the importance of identifying the statutory version applicable on the offense date and preserving that issue throughout plea and sentencing proceedings.