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Armijo-Mercado — Fifth Circuit upheld an 18-month illegal-reentry sentence

Unreported / Non-Citable

Case
United States of America v. Cesar Armijo-Mercado
Court
U.S. Court of Appeals for the Fifth Circuit
Judge
Stewart; Richman; Higginson
Date Decided
October 14, 2026
Docket No.
26-40149
Topics
Criminal Sentencing; Illegal Reentry; Substantive Reasonableness; Custody Credit
Source
Read the full opinion

Background

Cesar Armijo-Mercado pleaded guilty to being found in the United States after a previous deportation. The U.S. District Court for the Southern District of Texas imposed an 18-month sentence within the advisory guidelines range.

On appeal, Armijo-Mercado argued that the sentence was substantively unreasonable because his criminal-history category overstated the seriousness of his record. He also contended that the district court should have accounted for time he had spent in state custody. He preserved both arguments by presenting them below and advocating for a shorter sentence.

The Court’s Holding

The Fifth Circuit affirmed. Applying the rebuttable presumption that a properly calculated, within-guidelines sentence is reasonable, the court concluded that Armijo-Mercado had not shown that the district court overlooked a significant factor, relied too heavily on an improper or irrelevant factor, or clearly erred in balancing the factors under 18 U.S.C. § 3553(a).

The court explained that its precedent foreclosed a general challenge to the criminal-history guidelines as excessively punitive. Although the district court could consider whether the guidelines gave too much weight to Armijo-Mercado’s criminal history, it was not required to vary downward on that basis.

The district court lacked authority to award credit against the federal sentence for time spent in state custody, but it could consider that custody when selecting a sentence. Because the record showed that the district court considered Armijo-Mercado’s arguments, allocution, and presentence report before declining a downward variance, the Fifth Circuit found no basis to disturb the sentence.

Key Takeaways

  • A properly calculated sentence within the guidelines range receives a rebuttable presumption of substantive reasonableness in the Fifth Circuit.
  • A district court may consider whether a defendant’s criminal-history category overstates the seriousness of the defendant’s record, but it is not compelled to vary downward.
  • Although a sentencing court cannot itself award federal custody credit for time spent in state custody, it may consider that time when determining the appropriate sentence under § 3553(a).

Why It Matters

The decision underscores the difficulty of overturning a within-guidelines sentence as substantively unreasonable. Showing that the district court could have weighed mitigating circumstances differently is insufficient; the defendant must identify a materially omitted factor, an improper consideration, or a clear error in the court’s balancing.

It also clarifies the distinction between formally awarding custody credit and considering prior state custody as a mitigating circumstance at sentencing.

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