Federal-Officer Element Under 18 U.S.C. §§ 111/1114 Satisfied by Task-Force Deputization or “Assisting” Status Without MOU Formalities

1. Introduction

In United States v. Gigena (10th Cir. Aug. 13, 2026), the Tenth Circuit affirmed a jury conviction for assaulting a federal officer under 18 U.S.C. § 111(a)(1) (and the coverage provision in 18 U.S.C. § 1114) and upheld a below-guidelines sentence. The defendant, Gabriel Gigena, was arrested in Utah by a U.S. Marshals task force that included deputized local officers. During the arrest, Gigena placed a task-force officer, Officer Michael Piekarczyk, in a headlock that caused injuries.

On appeal (pro se), Gigena challenged: (i) the handling of his pretrial pro se filings while he was represented by counsel; (ii) multiple post-trial claims (misconduct, unlawful arrest, jury instructions, speedy trial, judicial disqualification, jurisdiction/tribal immunity, ineffective assistance); (iii) the sufficiency of evidence—especially whether the victim qualified as a “federal officer”; and (iv) procedural and substantive reasonableness of the sentence.

2. Summary of the Opinion

  • Pretrial pro se filings: Issues connected to lodged pretrial documents were treated as waived on appeal because Gigena did not challenge the district court’s relevant post-trial decision and because certain challenges must be raised pretrial under Fed. R. Crim. P. 12(b)(3).
  • Post-trial claims: Several claims failed under plain error review; some were deemed waived because Gigena did not argue plain error on appeal.
  • Jurisdiction/tribal immunity: The district court had subject-matter jurisdiction under 18 U.S.C. § 3231; tribal sovereignty arguments did not negate federal criminal jurisdiction for a § 111 prosecution.
  • Judicial disqualification: Denial of disqualification was affirmed for lack of compliance with 28 U.S.C. § 144 and lack of a developed showing of bias.
  • Ineffective assistance: Must be brought on collateral review, not direct appeal.
  • Sufficiency: Evidence was sufficient that the officer was deputized by the U.S. Marshals Service and, independently, § 1114 covers “any person assisting” federal officers; the government was not required to disprove defenses Gigena did not pursue at trial.
  • Sentencing: The district court did not procedurally err in adopting the PSR’s criminal-history scoring, and the below-guidelines sentence was substantively reasonable.

3. Analysis

3.1. Precedents Cited

Pro se filings while represented; waiver of issues not raised:

  • United States v. Sjodin (10th Cir. 2025): The court reiterated it construes pro se filings liberally but does not act as the litigant’s advocate—important to how the panel handled Gigena’s underdeveloped appellate assertions.
  • United States v. Pearl, 324 F.3d 1210 (10th Cir. 2003): Used to support the district court’s practice of declining pro se pleadings when a defendant is represented (rejecting “hybrid” representation absent permission).
  • Sawyers v. Norton, 962 F.3d 1270 (10th Cir. 2020): Anchored the panel’s conclusion that issues not raised in the opening brief are abandoned/waived.

Plain error and “plain error argument required” doctrine:

  • United States v. Gonzalez-Huerta, 403 F.3d 727 (10th Cir. 2005): Provided the controlling four-part plain error framework.
  • United States v. Chatwin, 60 F.4th 604 (10th Cir. 2023): Clarified that an error is “plain” if clear or obvious.
  • United States v. Leffler, 942 F.3d 1192 (10th Cir. 2019): Critical to the court’s refusal to review certain claims at all where Gigena neither preserved them nor argued plain error on appeal—treated as waiver, not mere forfeiture.

Prosecutorial misconduct / Brady / speedy trial:

  • United States v. Christy, 916 F.3d 814 (10th Cir. 2019): Supplied the due-process-focused standard for prosecutorial misconduct (prejudice to a constitutional right or fundamental unfairness).
  • Brady v. Maryland, 373 U.S. 83 (1963): Framed the claimed disclosure violation.
  • United States v. Velarde, 485 F.3d 553 (10th Cir. 2007): Provided the elements of a Brady claim (suppression, favorability, materiality), which Gigena failed to satisfy by identifying any evidence.
  • United States v. Medina, 918 F.3d 774 (10th Cir. 2019): Applied the presumptive-prejudice threshold (delay approaching one year) to reject the speedy-trial argument.

Subject-matter jurisdiction and tribal arguments:

  • Youren v. Tintic Sch. Dist., 343 F.3d 1296 (10th Cir. 2003): Cited for de novo review of subject-matter jurisdiction.

Judicial disqualification:

  • United States v. Cooley, 1 F.3d 985 (10th Cir. 1993): Standard of review—abuse of discretion—for denial of disqualification.
  • Bell v. Chandler, 569 F.2d 556 (10th Cir. 1978): Explained the sufficiency requirement—facts must fairly support a “bent of mind” impeding impartiality.
  • In re McCarthey, 368 F.3d 1266 (10th Cir. 2004): Emphasized the “substantial burden” on the movant under § 144 and that timeliness/sufficiency are required.
  • Green v. Dorrell, 969 F.2d 915 (10th Cir. 1992): Reinforced that § 144 disqualification requires a timely and sufficient affidavit.

Ineffective assistance on direct appeal:

  • United States v. Galloway, 56 F.3d 1239 (10th Cir. 1995): Reaffirmed the general rule that ineffective-assistance claims should be raised in collateral proceedings.

Sufficiency-of-evidence methodology:

  • United States v. Robinson, 993 F.3d 839 (10th Cir. 2021): De novo review; no weighing credibility.
  • United States v. Isabella, 918 F.3d 816 (10th Cir. 2019): Light most favorable to government; reversal only if no reasonable jury could convict.
  • United States v. Rahseparian, 231 F.3d 1257 (10th Cir. 2000): Reasonable inference vs speculation.
  • United States v. Tennison, 13 F.4th 1049 (10th Cir. 2021): Evaluate evidence as a whole, not in fragments.

Sentencing review, reasonableness, and PSR challenges:

  • United States v. Haley, 529 F.3d 1308 (10th Cir. 2008): Procedural unreasonableness categories; abuse-of-discretion reasonableness review.
  • United States v. Henry, 164 F.3d 1304 (10th Cir. 1999): De novo guideline interpretation; clear error for factual findings.
  • United States v. Smart, 518 F.3d 800 (10th Cir. 2008): Procedural vs substantive reasonableness distinction.
  • United States v. Maldonado-Passage, 56 F.4th 830 (10th Cir. 2022): Substantive reasonableness focuses on whether sentence fairly reflects factors/circumstances.
  • United States v. Lente, 759 F.3d 1149 (10th Cir. 2014): “Arbitrary, capricious, whimsical, or manifestly unreasonable” formulation.
  • United States v. McDonald, 43 F.4th 1090 (10th Cir. 2022): Defendant’s affirmative duty to show PSR unreliability; a bare reliability objection does not trigger the court’s Fed. R. Crim. P. 32(i)(2)(B) fact-finding obligation.
  • United States v. Balbin-Mesa, 643 F.3d 783 (10th Cir. 2011): Presumption of reasonableness for within-guidelines sentences; here applied in support of reasonableness where the district court imposed a below-guidelines sentence.

3.2. Legal Reasoning

(a) Hybrid representation and pretrial motion practice: The panel accepted the district court’s initial refusal to consider Gigena’s pro se filings while he was represented, consistent with United States v. Pearl. It then treated related appellate issues as waived because Gigena did not properly raise them in his opening brief after the district court (post-trial) reviewed them “out of an abundance of caution” and found them meritless, invoking Sawyers v. Norton. The opinion also underscored that certain objections (e.g., indictment sufficiency and vindictive prosecution) must be raised before trial under Fed. R. Crim. P. 12(b)(3).

(b) Unpreserved claims, plain error, and “plain-error briefing”: The court applied United States v. Gonzalez-Huerta and United States v. Chatwin to evaluate unpreserved claims. It rejected the prosecutorial misconduct and Brady arguments because they were conclusory and failed to identify specific conduct/evidence as required by United States v. Christy and United States v. Velarde. It rejected the speedy-trial claim because Gigena did not show presumptive prejudice under United States v. Medina. Critically, for unlawful-arrest and jury-instruction claims, the panel relied on United States v. Leffler to deem the issues waived because Gigena did not argue plain error on appeal—demonstrating a recurring appellate gatekeeping rule: absent preservation, an appellant must brief plain error or lose review.

(c) Tribal sovereignty does not defeat federal criminal jurisdiction under § 111: The panel separated the alleged defects in a California custody order/warrant from the federal prosecution for assault on a federal officer. Because Gigena was charged with violating federal criminal statutes, the district court’s subject-matter jurisdiction was straightforward under 18 U.S.C. § 3231, reviewed de novo per Youren v. Tintic Sch. Dist..

(d) Disqualification requires compliance and a developed showing of partiality: Applying United States v. Cooley, the panel found no abuse of discretion in denying disqualification. Under 28 U.S.C. § 144, as explained in Bell v. Chandler, In re McCarthey, and Green v. Dorrell, the movant must file a timely and sufficient affidavit showing facts supporting bias. Gigena’s arguments (assignment/recusal history and alleged suppression of unspecified exculpatory evidence) were procedurally and substantively inadequate.

(e) § 111 federal-officer element—task-force deputization and “assisting” status: On sufficiency review, the court held the evidence supported that Officer Piekarczyk was deputized by the U.S. Marshals Service, bringing him within the statutory coverage of 18 U.S.C. §§ 111(a)(1) and 1114. The court further emphasized the independent statutory basis: § 1114 also covers “any person assisting” federal officers. Accordingly, Gigena’s attempted formalistic requirements—warrant-in-hand, U.S. Attorney approval, or a memorandum of understanding—did not undermine the federal-officer element as charged and proved.

(f) No obligation to disprove defenses not pursued at trial: The panel rejected the claim that the government had to “overcome” defenses such as self-defense, honest mistake, excessive force, or entrapment where Gigena did not raise them at trial or seek instructions. The court treated intent as provable by the government’s evidence of forcible interference/assault without litigating unasserted affirmative theories.

(g) Sentencing—PSR reliance and criminal-history objections: For procedural reasonableness, the court applied United States v. McDonald to hold that Gigena did not satisfy his “affirmative duty” to show PSR unreliability. A bare claim that records were unavailable or insufficiently corroborated did not create a genuine factual dispute requiring findings under Fed. R. Crim. P. 32(i)(2)(B). For substantive reasonableness, the court relied on the district judge’s § 3553(a) explanation and noted the sentence was below the advisory range, which supported its reasonableness analysis (with United States v. Balbin-Mesa cited on the presumption framework).

3.3. Impact

  • § 111 prosecutions involving joint task forces: The decision strengthens (at least persuasively) the government’s ability to prove the federal-officer element through evidence of deputization or through § 1114’s “assisting” clause, without needing to litigate interagency paperwork such as MOUs as an element-of-the-offense requirement.
  • Appellate practice—plain error is not optional: The opinion reinforces a strict appellate consequence under United States v. Leffler: failure to preserve and failure to argue plain error can eliminate review entirely.
  • Pro se strategy risks while represented: By relying on United States v. Pearl, the decision illustrates the limited effect of pro se filings made during representation and the importance of raising Rule 12(b)(3) issues properly and timely through counsel.
  • Tribal-sovereignty arguments in federal criminal court: The opinion underscores that generalized invocations of tribal status do not deprive federal courts of § 3231 jurisdiction over federal crimes such as assault on a federal officer.
  • Sentencing objections to PSRs: The decision signals that defendants must do more than point to missing documentation; they must identify why specific PSR facts are untrue or inaccurate to trigger fact-finding obligations.

4. Complex Concepts Simplified

  • “Waiver” vs. “forfeiture”: Forfeiture is failing to raise an issue in time; an appellate court may still review for plain error. Waiver is treated as an intentional (or procedurally definitive) abandonment; the court often will not review at all. Under United States v. Leffler, not briefing plain error can lead to waiver-like treatment.
  • Plain error review: A demanding standard requiring (1) error, (2) that is clear/obvious, (3) affecting substantial rights, and (4) seriously affecting the fairness/integrity/public reputation of proceedings (United States v. Gonzalez-Huerta).
  • Brady material: The government violates Brady v. Maryland only if it suppresses evidence that is both favorable and material. Simply alleging “exculpatory evidence exists” is not enough (United States v. Velarde).
  • Subject-matter jurisdiction: The legal authority of a court to hear a category of cases. Federal district courts have jurisdiction over “all offenses against the laws of the United States” under 18 U.S.C. § 3231.
  • Who counts as a “federal officer” under §§ 111/1114: Coverage includes not only federal employees but also persons “assisting” them. Task-force deputization and assistance in executing federal duties can satisfy this element.
  • Procedural vs. substantive reasonableness (sentencing): Procedural concerns how the sentence was calculated and explained (Guidelines, facts, § 3553(a)); substantive concerns whether the length is reasonable given the circumstances.
  • PSR (Presentence Investigation Report): A report used for sentencing that includes offense conduct and criminal history. If a defendant disputes facts, he must identify what is inaccurate and why; a generalized reliability objection may not require the judge to hold additional fact-finding (United States v. McDonald).

5. Conclusion

United States v. Gigena affirms a § 111 conviction and below-guidelines sentence while delivering several practical appellate and trial lessons: (1) joint task-force and “assisting” relationships can satisfy the federal-officer element under §§ 111/1114 without elevating interagency paperwork into an element of the offense; (2) unpreserved claims often live or die by a properly briefed plain-error argument; (3) pro se filings made while represented are commonly disregarded; (4) tribal-sovereignty assertions do not negate federal criminal subject-matter jurisdiction under § 3231; and (5) sentencing challenges to PSR criminal history require concrete, articulated proof of inaccuracy, not speculation about missing records.