10th Cir.

United States v. Ulibarri

May 27, 2026 ·25-1281 ·Panel Decision ·Kelly · By James Taylor

The Tenth Circuit affirmed a forty-one-month prison sentence for a dentist convicted of tax evasion. The court rejected arguments that the district court erred in calculating tax loss or applying a sophisticated means enhancement.

Listen to this decision 0:00 / 1:24

Background

Ryan Ulibarri, a licensed dentist in Colorado, used an abusive trust scheme to evade over one point six million dollars in federal taxes on five point three million dollars in earnings. He funneled business income through a series of sham trusts to claim false deductions and retain control of the funds without paying taxes. Despite warnings from attorneys and accountants, Ulibarri continued the scheme for over seven years, even after receiving a target letter from the Department of Justice. He pleaded guilty to six counts of tax evasion and was sentenced to forty-one months of imprisonment, three months of supervised release, restitution, and a fine.

The court’s reasoning

The panel reviewed the sentence for procedural and substantive reasonableness. On procedural grounds, the court held that the district court correctly included the 2023 tax loss in the total amount because it was part of the same course of conduct as the charged offenses. The court also affirmed the sophisticated means enhancement, noting that Ulibarri used multiple financial accounts and fictitious entities to hide income, which is more complex than simply lying on a tax form. On substantive grounds, the court found the district court properly considered the factors under Section thirty-five fifty-three of Title eighteen of the United States Code. The court determined that the sentence was sufficient but not greater than necessary to reflect the seriousness of the crime and deter future conduct.

What it means going forward

The decision reinforces that uncharged conduct forming part of a continuous tax evasion scheme must be aggregated for sentencing loss calculations. It also confirms that using complex trust structures to conceal income qualifies as sophisticated means, warranting a two-level sentencing enhancement.

Play