United States v. Preston — Eighth Circuit affirmed after declining to consider ineffective-assistance and inadequately briefed misconduct claims

Case
United States of America v. Justin Dequize Preston
Court
U.S. Court of Appeals for the Eighth Circuit
Judge
Gruender; Kelly; Kobes
Date Decided
October 28, 2026
Docket No.
25-2288
Topics
Ineffective Assistance; Prosecutorial Misconduct; Appellate Briefing; Plea Agreements
Source
Read the full opinion

Background

Justin Preston pleaded guilty to possessing a stolen firearm in violation of 18 U.S.C. §§ 922(j) and 924(a)(2). His plea agreement jointly recommended a 120-month sentence and waived his right to appeal nonjurisdictional issues, except claims of prosecutorial misconduct, in exchange for dismissal of the indictment’s remaining counts.

The district court accepted the agreement and imposed the recommended sentence. On appeal, Preston argued that trial counsel was ineffective and that prosecutors introduced testimony at a suppression hearing that they knew or should have known was false. The government moved to dismiss the appeal under the appeal waiver.

The Court’s Holding

The Eighth Circuit affirmed. It declined to consider Preston’s ineffective-assistance claim on direct appeal because such claims ordinarily depend on facts outside the existing record and are better addressed in proceedings under 28 U.S.C. § 2255. The court noted that Preston’s plea agreement expressly preserved his ability to pursue ineffective-assistance claims through that avenue.

The court also declined to reach the merits of Preston’s prosecutorial-misconduct claim because his one-paragraph argument cited neither the record nor legal authority, as required by Federal Rule of Appellate Procedure 28(a)(8)(A). Having resolved the appeal on those grounds, the court dismissed as moot the government’s motion to dismiss based on the appeal waiver.

Key Takeaways

  • Ineffective-assistance claims that depend on facts outside the record ordinarily should be raised in a § 2255 proceeding rather than on direct appeal.
  • An appellate claim may receive no merits review when it is presented only cursorily and lacks citations to supporting authority and record evidence.
  • Because the court affirmed without enforcing the appeal waiver, it dismissed the government’s waiver-based motion as moot.

Why It Matters

The decision underscores that preserving an issue in a plea agreement does not excuse inadequate appellate briefing. Even though Preston’s agreement permitted an appeal alleging prosecutorial misconduct, he still had to develop the claim with legal analysis and record citations.

It also reinforces the Eighth Circuit’s usual procedural path for ineffective-assistance claims: defendants generally must develop those claims through postconviction proceedings, where an evidentiary record can be created.

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