Jus Cogens Violations Are Not “Official Acts”: No Conduct-Based Foreign Official Immunity for TVPA Extrajudicial Killing Claims

Introduction

In Gert Kuiper v. Mario Reyes Mena (4th Cir. July 8, 2026), the Fourth Circuit confronted a recurring tension in transnational human-rights litigation: the traditional comity-based doctrine of foreign official immunity versus accountability for atrocities that international law treats as peremptory, non-derogable wrongs.

The case arises from the Salvadoran civil war. Plaintiff Gert Jannes Kuiper sued Mario Adalberto Reyes Mena—alleged to have been a colonel and commander of El Salvador’s Fourth Infantry Brigade—for ordering an ambush in March 1982 that killed four Dutch journalists, including the plaintiff’s brother, Jan Kuiper. The suit was brought under the Torture Victim Protection Act of 1991 (TVPA), seeking declaratory relief and damages for an “extrajudicial killing.”

The key issue on interlocutory appeal was narrow but consequential: whether Reyes Mena could invoke common-law conduct-based foreign official immunity (sometimes called “foreign official immunity”) to defeat TVPA claims at the pleading stage where the complaint alleges conduct that, if proven, constitutes a jus cogens violation—here, extrajudicial killing.

Summary of the Opinion

The Fourth Circuit affirmed the district court’s denial of conduct-based foreign official immunity. Relying principally on Yousuf v. Samantar, 699 F.3d 763 (4th Cir. 2012), the court reiterated that foreign officials are not entitled to conduct-based immunity for alleged violations of jus cogens norms, even when the acts are claimed to have been performed in an official capacity.

The panel treated jus cogens not as a “mere exception” to immunity but as a conceptual limit: conduct that violates peremptory norms is not recognized as a sovereign act for which common-law immunity attaches. Because the complaint alleged that Reyes Mena ordered the ambush and killing of unarmed journalists—an alleged extrajudicial killing—the court held immunity unavailable at the motion-to-dismiss stage and remanded for further proceedings.

Analysis

Precedents Cited

1) Yousuf v. Samantar, 699 F.3d 763 (4th Cir. 2012)

Yousuf is the opinion’s backbone. The court quoted and applied its central holding: “under international and domestic law, officials from other countries are not entitled to foreign official immunity for jus cogens violations, even if the acts were performed in the defendant’s official capacity.”

Reyes Mena attempted to distinguish Yousuf by arguing Somalia lacked a recognized government at the relevant time, reducing comity concerns. The panel rejected that reading, emphasizing that Yousuf did not turn on Somalia’s recognition status but on the nature of the alleged conduct (jus cogens violations), which international law does not treat as sovereign acts.

2) Warfaa v. Ali, 811 F.3d 653 (4th Cir. 2016)

Warfaa reinforced that the Fourth Circuit considers itself bound to Yousuf and that the jus cogens limitation applies in civil TVPA litigation. The panel used Warfaa to dispose of the appellant’s invitation to revisit or narrow Yousuf, noting that a panel cannot overrule circuit precedent.

3) Samantar v. Yousuf, 560 U.S. 305 (2010)

The Supreme Court’s Samantar decision supplies the structural framework: the FSIA governs foreign state immunity, but does not provide immunity rules for individual foreign officials; their immunity remains governed by the pre-FSIA common law. The Fourth Circuit used Samantar to reject the argument that Congress’s choices in the FSIA (including any absence of a “jus cogens exception” for states) should control common-law foreign official immunity.

4) Foundational comity and “acts of state” themes: Underhill v. Hernandez, 168 U.S. 250 (1897) and Schooner Exch. v. McFaddon, 11 U.S. (7 Cranch) 116 (1812)

These cases stand for the general proposition that sovereign equality and comity counsel against one nation’s courts judging another’s sovereign acts within its territory. Reyes Mena invoked that logic to frame the suit as an improper adjudication of wartime military operations. The panel accepted these principles as the baseline justification for immunity, but held they do not extend to acts that international law refuses to recognize as sovereign (jus cogens violations).

5) Interlocutory review: Cohen v. Beneficial Indus. Loan Corp., 337 U.S. 541 (1949)

The appeal was taken under the collateral-order doctrine. The opinion’s citation to Cohen (via Yousuf) underscores that immunity questions are often reviewed immediately because immunity is a right not to stand trial, not merely a defense to liability.

6) Scope of conduct-based immunity and “official acts”: Chuidian v. Philippine Nat'l Bank, 912 F.2d 1095 (9th Cir. 1990) and Restatement (Second) of Foreign Relations Law § 66(f)

The panel described conduct-based immunity in Restatement terms: immunity can attach to acts performed in an official capacity where adjudication would effectively enforce law against the state. By citing Chuidian, the court reaffirmed the classic distinction between official acts (potentially immune) and private acts (not immune), setting up the crucial move: jus cogens conduct is not treated as a legitimate “official act” for immunity purposes.

7) Jus cogens defeats “sovereign act” characterization: Siderman de Blake v. Republic of Argentina, 965 F.2d 699 (9th Cir. 1992)

This citation provided a crisp formulation: “International law does not recognize an act that violates jus cogens as a sovereign act.” The Fourth Circuit relied on that idea to rebut the appellant’s insistence that a jus cogens “exception” would improperly undermine comity. The court’s point is conceptual: the act is not being carved out from immunity; it never qualifies for sovereign-act immunity to begin with.

8) Identifying peremptory norms: Tel-Oren v. Libyan Arab Republic, 726 F.2d 774 (D.C. Cir. 1984) (Edwards, J., concurring) and Restatement (Third) of Foreign Relations Law § 702 cmt. n

These authorities were used to validate that torture and summary/extrajudicial execution are among the internationally condemned, peremptory norms. The opinion tied the TVPA’s subject matter—torture and extrajudicial killing—to this established jus cogens catalogue.

9) Comparative and international materials: Att'y Gen. of Israel v. Eichmann, 16 Piske Din 2033 (1962), 36 I.L.R. 277 (1968) and Regina v. Bartle, ex parte Pinochet, [1999] 2 W.L.R. 827 (HL)

The panel cited these decisions to show that other jurisdictions likewise deny immunity where officials are accused of grave international crimes. Importantly, the opinion used them not as binding law, but as corroboration that the jus cogens limitation is consistent with broader international practice.

10) FSIA/state immunity versus official immunity: Alfred Dunhill of London, Inc. v. Republic of Cuba, 425 U.S. 682 (1976)

Reyes Mena relied on Alfred Dunhill for the idea that courts should not sit in judgment of foreign governmental acts. The panel treated this as an articulation of the comity rationale but held it cannot convert alleged extrajudicial killing into a protected sovereign act.

11) TVPA’s relationship to common-law immunity: Lewis v. Mutond, 918 F.3d 142 (D.C. Cir. 2019) (Srinivasan, J., concurring)

The opinion cited this concurrence to support the view that the TVPA contemplates liability for officials acting in an official capacity, thereby undercutting the notion that conduct-based immunity should bar TVPA claims categorically. Even though the Fourth Circuit’s holding rests on jus cogens/non-sovereign-act reasoning, the TVPA’s design supplies additional policy coherence: Congress created a cause of action precisely for these kinds of abuses.

Legal Reasoning

  1. Identify the governing immunity source. The court reaffirmed that individual foreign official immunity is common law after Samantar v. Yousuf, not FSIA statutory immunity.
  2. Define conduct-based foreign official immunity. Immunity can attach to official acts where adjudication would, in effect, enforce a rule of law against the foreign state. The State Department’s “suggestion of immunity” can be influential, but courts may decide immunity under common law absent an executive suggestion.
  3. Explain jus cogens as a limit on what counts as sovereign/official conduct. The court rejected framing jus cogens as a discretionary “exception.” Instead, because jus cogens norms are peremptory and non-derogable, conduct violating them is not treated as “officially authorized by the Sovereign” for immunity purposes.
  4. Apply the rule to the pleaded allegations. Accepting the complaint’s allegations as true at the motion-to-dismiss stage, the alleged planning and ordering of an ambush to kill unarmed journalists constitutes an extrajudicial killing—within the core of jus cogens prohibitions recognized in the circuit’s precedent. Therefore, conduct-based immunity cannot bar the suit at this stage.
  5. Reject attempted carve-outs. The panel rejected four limiting arguments: (a) Yousuf is not confined to unrecognized governments; (b) FSIA’s structure does not control official immunity; (c) the civil (not criminal) posture does not restore immunity for the same conduct; (d) a panel cannot overrule Yousuf (reinforced by Warfaa).

Impact

  • Reaffirmation and clarification within the Fourth Circuit. The decision strengthens the circuit’s line (Yousuf → Warfaa → Kuiper) that alleged jus cogens violations preclude conduct-based foreign official immunity at the pleading stage.
  • No “recognized-government” safe harbor. By rejecting the attempt to limit Yousuf to failed or unrecognized states, the court signals that comity concerns do not depend on whether the defendant acted for an ally or a stable government; the controlling question is the nature of the alleged act.
  • Civil human-rights litigation viability. The court’s explicit refusal to confine the jus cogens limitation to criminal proceedings maintains a meaningful civil accountability pathway under the TVPA for torture and extrajudicial killing claims.
  • Litigation posture and early-stage consequences. Defendants may still contest merits, causation, limitations, evidentiary proof, personal jurisdiction, and other defenses. But where a complaint plausibly alleges extrajudicial killing, conduct-based immunity is unlikely to end the case on a Rule 12 motion in this circuit.
  • Potential for further appellate attention. The opinion notes the appellant’s preservation argument for en banc review, and the topic remains contested nationally. The decision thus contributes to an evolving and closely watched area at the intersection of foreign relations and human-rights accountability.

Complex Concepts Simplified

  • Conduct-based foreign official immunity: A doctrine that can protect a foreign official from being sued in U.S. courts for actions taken as part of the official’s job—because suing the official would effectively judge or bind the foreign state.
  • “Suggestion of immunity” (State Department): A statement by the U.S. Executive Branch indicating whether it believes an official should be immune. Courts give it “substantial weight,” but may still decide immunity under common law if no suggestion is provided.
  • Jus cogens: Peremptory rules of international law accepted by the international community as non-derogable (no state may lawfully authorize them). Examples include torture and extrajudicial killing.
  • Why jus cogens defeats conduct-based immunity in this opinion’s framework: Not because courts create an ad hoc “exception,” but because acts like torture and extrajudicial killing are treated as outside legitimate sovereign authority—so they cannot be “official acts” entitled to the sovereign’s immunity.
  • Extrajudicial killing (TVPA context): A killing carried out under color of foreign law but without a lawful judicial process—often associated with summary executions or targeted killings of civilians outside due process.
  • Interlocutory appeal / collateral-order doctrine: A limited path to appeal before final judgment. Immunity denials often qualify because immunity is meant to prevent the burdens of litigation itself.

Conclusion

Gert Kuiper v. Mario Reyes Mena cements a clear Fourth Circuit rule: when a complaint plausibly alleges a jus cogens violation—here, an extrajudicial killing actionable under the TVPA—a foreign official cannot obtain dismissal on the basis of common-law conduct-based foreign official immunity, even if the conduct is claimed to have been undertaken as part of official wartime operations for a recognized government.

The opinion’s significance lies in its conceptual framing: jus cogens is not treated as a discretionary “exception” that weakens comity, but as a boundary that defines what international law will recognize as sovereign action in the first place. In practical terms, the decision preserves civil accountability mechanisms in U.S. courts for the gravest human-rights abuses while leaving merits questions for later stages of litigation.