United States v. Diaz-Osuna — Fifth Circuit upheld the denial of an Amendment 821 sentence reduction

Case
United States of America v. Hector Miguel Diaz-Osuna
Court
U.S. Court of Appeals for the Fifth Circuit
Judge
Davis; Jones; Richman
Date Decided
September 22, 2026
Docket No.
26-60174
Topics
Sentence Reduction, Amendment 821, Sentencing Factors, Abuse of Discretion
Source
Read the full opinion

Background

Hector Miguel Diaz-Osuna was convicted of voluntary manslaughter and conspiring to cause a riot in a federal penal facility. The district court imposed consecutive prison terms of 180 months for manslaughter and 120 months for conspiracy, totaling 300 months.

After Amendment 821 to the Sentencing Guidelines became retroactive, Diaz-Osuna’s criminal-history category fell from III to II, producing an amended guidelines range of 235 to 293 months. The district court sua sponte declined to reduce his sentence under 18 U.S.C. § 3582(c)(2) and then denied reconsideration. Diaz-Osuna appealed, arguing that leaving the 300-month sentence intact undermined consistency and uniformity in sentencing.

The Court’s Holding

The Fifth Circuit affirmed. Although the government did not dispute Diaz-Osuna’s eligibility for a reduction, eligibility did not entitle him to one. The district court recognized its authority to reduce the sentence but declined to do so after weighing the factors under 18 U.S.C. § 3553(a).

The appellate court concluded that the district court considered the need to avoid unwarranted sentencing disparities but found that the seriousness of Diaz-Osuna’s offenses, his criminal history, and the goals of sentencing weighed against relief. Diaz-Osuna’s disagreement with that balancing did not establish an abuse of discretion. His appeal from the denial of reconsideration also brought the underlying denial of a sentence reduction before the court for review.

Key Takeaways

  • Eligibility for a sentence reduction under 18 U.S.C. § 3582(c)(2) does not require a district court to grant one.
  • A district court may deny relief after considering the 18 U.S.C. § 3553(a) factors, even when a retroactive guidelines amendment lowers the defendant’s advisory range.
  • A defendant’s disagreement with how the district court weighed sentencing uniformity against offense seriousness, criminal history, and other sentencing goals is insufficient by itself to show an abuse of discretion.

Why It Matters

The decision underscores the discretionary nature of sentence reductions based on retroactive guidelines amendments. Even where Amendment 821 lowers the applicable range below the original sentence, the district court may retain that sentence if its assessment of the statutory sentencing factors supports doing so.

For practitioners, the opinion highlights that a successful § 3582(c)(2) request must address not only eligibility and the amended range but also why the § 3553(a) factors favor a reduction. On appeal, merely urging a different balance of those factors generally will not satisfy the abuse-of-discretion standard.

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