Background
Defendant Michael Joseph Dias was convicted by a federal jury of possessing ammunition as a felon in violation of 18 U.S.C. Section 922(g)(1). The incident occurred in April 2024 when Dias entered an apartment in Oklahoma City, leading to a struggle with the resident. Dias fled the scene after allegedly firing one or two shots at the resident, leaving behind a shell casing. Dias was arrested after a foot chase. The district court admitted evidence of Dias’s 2019 prior conviction for felon-in-possession of a firearm and imposed a 120-month sentence, varying upward from the Guidelines range of 63 to 78 months.
The court’s reasoning
The Tenth Circuit analyzed four issues raised by Dias. First, regarding the admission of Rule 404(b) evidence, the court agreed with the government that the district court erred in admitting the prior conviction to prove knowledge. In cases of actual possession, knowledge is rarely a disputed issue, making the prior conviction irrelevant and prejudicial. However, the court applied a harmless-error analysis, concluding the error did not affect the outcome due to the strength of the eyewitness testimony, video evidence, and physical evidence. Second, the court rejected the sufficiency of the evidence challenge, noting that credibility determinations are for the jury and the evidence was sufficient to support the conviction. Third, the court found the sentence was not substantively unreasonable, as the district court properly considered the defendant’s recidivist conduct and the nature of the offense under 18 U.S.C. Section 3553(a).
The district court abused its discretion in admitting the prior conviction under Rule 404(b) because the evidence was not relevant.
United States v. Dias, 25-6028 (10th Cir. 2026)
What it means going forward
The decision clarifies that in felon-in-possession cases based on actual possession, prior convictions are generally inadmissible to prove knowledge, though such errors may be harmless if other evidence of guilt is overwhelming. It also reinforces the discretion of district courts to impose upward variances based on recidivist conduct.
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