After the UN’s Iran Findings, What Accountability Is Actually Possible?

A United Nations-mandated fact-finding mission has concluded that there are reasonable grounds to believe U.S. forces committed war crimes in two February 2026 strikes in Iran, including an attack on a primary school in Minab that killed more than 150 people, according to the mission’s findings reported on September 17. The same report says Iranian authorities committed crimes against humanity during their crackdown on nationwide protests. These are serious findings, but they are not criminal convictions, and the UN mission itself cannot arrest, prosecute or sentence anyone.

What happens next therefore depends less on the label attached to the findings than on which legal system can obtain jurisdiction, preserve evidence and bring an actual case. Possible routes include domestic investigations and prosecutions, prosecutions in third countries under forms of universal or extraterritorial jurisdiction, proceedings before the International Criminal Court if jurisdictional requirements are satisfied or the Security Council acts, and state-to-state proceedings or diplomatic measures. Each route has substantial legal and political obstacles. The most immediate consequence of the UN report may therefore be evidence preservation and the creation of a record that could support future proceedings, rather than an immediate courtroom judgment.

What the UN findings actually establish

The distinction between a fact-finding finding and a judicial judgment is central.

The Independent International Fact-Finding Mission on Iran was established by the UN Human Rights Council to investigate alleged violations, establish facts and circumstances, and collect, consolidate, analyze and preserve evidence. The Council specifically contemplated that this evidence could contribute to cooperation in legal proceedings.

The mission is therefore not a criminal court.

Its September 2026 conclusions reportedly concern two U.S. strikes. In Minab, investigators concluded that the United States failed to do everything feasible to verify that the primary school was a military objective. The mission also examined a strike in Lamerd that caused civilian casualties. The investigators relied on material including satellite imagery, verified video, weapons analysis and witness accounts because the United States and Israel did not give the mission access to personnel or respond to its requests for information.

The report also addresses Iran’s domestic conduct. Investigators found reasonable grounds to believe Iranian authorities committed crimes against humanity during the crackdown that began in late December 2025, including unlawful killings, torture and arbitrary detention.

That language matters. “Reasonable grounds” is an evidentiary conclusion by an investigative body, not the equivalent of a conviction beyond reasonable doubt. A future prosecutor or court would still need to establish the elements of particular crimes and the individual responsibility of particular defendants under the law governing the case.

What accountability can mean

Accountability is broader than imprisonment.

Depending on the circumstances, it can include:

• criminal investigation and prosecution;
• identification of individual perpetrators and commanders;
• arrest warrants;
• disciplinary or military proceedings;
• compensation and other forms of reparations;
• official investigations and disclosure of findings;
• sanctions or other measures against individuals;
• preservation of evidence for later proceedings;
• institutional reforms intended to prevent recurrence.

The different mechanisms serve different purposes. A criminal trial seeks to determine individual criminal responsibility. A state-to-state proceeding addresses obligations of states. Reparations focus on victims. Sanctions are coercive or political measures and are not substitutes for a criminal judgment.

The UN’s earlier work on Iran has explicitly emphasized truth, justice, accountability and reparations, including investigations outside Iran when domestic mechanisms are inadequate.

The main accountability routes

Could the International Criminal Court prosecute anyone?

The International Criminal Court is the most obvious international criminal-law institution, but its jurisdiction presents a major complication.

The ICC can exercise jurisdiction through several routes. Under Article 12 of the Rome Statute, territorial or nationality jurisdiction can apply when the relevant state is a party to the Statute or has accepted the Court’s jurisdiction. The Security Council can also refer a situation to the Court under Chapter VII of the UN Charter, including situations involving states that are not parties to the Rome Statute.

That creates a significant obstacle here.

Iran is not an ICC state party, and the United States is also not a party. Consequently, the fact that a UN investigation has identified conduct that may constitute war crimes does not automatically give the ICC jurisdiction.

A Security Council referral could theoretically change that position. But such a referral would require the necessary Security Council action, making the political dynamics of the Council an important practical barrier.

And even if jurisdiction were established, the ICC would still need to conduct its own legal assessment. A UN fact-finding report could provide evidence, leads and investigative material, but it would not compel the Prosecutor or judges to reach the same conclusions.

The Court’s complementarity rules would also matter. The ICC is designed to complement, rather than simply replace, functioning national criminal jurisdictions. Under Article 17 of the Rome Statute, a case can be inadmissible when a state with jurisdiction is genuinely investigating or prosecuting it, subject to the Statute’s conditions.

Could another country prosecute?

This is one of the more practical possibilities.

Some national legal systems allow courts to prosecute certain international crimes even when they occurred abroad and neither the victim nor the accused is a national. This is commonly described as universal jurisdiction, although the precise legal basis and scope differ between countries.

The UN’s Special Rapporteur on Iran has previously urged states to use universal and other forms of extraterritorial jurisdiction where Iranian domestic institutions were unable or unwilling to investigate serious international crimes. The recommendations specifically contemplated identifying suspects, investigating commanders and other superiors, and seeking arrest warrants where sufficient admissible evidence exists.

Such cases are not automatic.

A prosecutor in a third country would need a domestic legal basis, sufficient evidence and an appropriate defendant or jurisdictional connection. National laws may impose additional requirements. Some jurisdictions restrict universal-jurisdiction cases to suspects who are physically present in the country.

That makes travel potentially important. An individual who can safely remain in a country that lacks the necessary jurisdiction may be difficult to prosecute. The same individual could face a very different legal situation if they enter a country whose courts can exercise jurisdiction over the alleged crimes.

What about U.S. accountability for the alleged strikes?

The U.S. side presents a different legal problem because the alleged conduct concerns U.S. military personnel and operations.

A U.S. investigation could examine targeting decisions, intelligence assessments, rules of engagement, precautions taken to protect civilians, the weapons used and the chain of command.

The crucial question would be whether the available evidence establishes a violation of applicable international humanitarian law and, separately, whether particular individuals can be held criminally responsible under applicable U.S. law.

A finding that civilians were killed does not by itself establish a war crime. International humanitarian law distinguishes between lawful attacks that unintentionally cause civilian casualties and unlawful attacks, including attacks directed against civilians or civilian objects and attacks that fail to meet applicable requirements of distinction, proportionality or precautions.

The UN mission’s finding goes further than merely recording civilian deaths: it says the Minab strike reflected a failure to adequately verify the target and describes the conduct as reckless. But a criminal prosecution would still have to establish the relevant legal elements and individual responsibility.

That is one reason an independent investigation matters.

Could commanders be held responsible?

Potentially, but command responsibility is not simply a doctrine of “the person at the top is responsible.”

International criminal law can impose responsibility on superiors in circumstances where the legal requirements are satisfied, including relevant authority or control over subordinates and the required knowledge and failure to prevent or repress crimes.

Establishing those elements requires evidence.

For a military strike, investigators might therefore seek records showing:

• who selected or approved the target;
• what intelligence was available;
• what was known about the location;
• whether the target was verified;
• what precautions were considered;
• what alternative weapons or tactics were available;
• who authorized the operation;
• what happened after civilian casualties became known;
• whether an investigation followed;
• whether evidence was preserved.

A fact-finding report can help identify those questions. It does not by itself resolve them.

The same principle applies to Iranian officials accused of crimes against humanity. Establishing that a widespread or systematic attack against a civilian population occurred is distinct from proving the criminal responsibility of a particular official.

For a broader explanation of how responsibility becomes more complicated when humans delegate decisions to autonomous systems, is relevant.

The International Court of Justice is a different option

The International Court of Justice (ICJ) should not be confused with the ICC.

The ICC prosecutes individuals for international crimes. The ICJ hears disputes between states and can determine whether a state has breached an international obligation when it has jurisdiction over the dispute.

That distinction matters enormously.

A government could potentially pursue state responsibility through the ICJ if a legal instrument gives the Court jurisdiction. But a judgment against a state would not be the same thing as a criminal conviction of a military commander or political leader.

The ICJ’s own jurisprudence demonstrates the distinction between state responsibility and individual criminal responsibility. Its proceedings can result in findings that a state violated an international obligation without functioning as a criminal prosecution of an individual.

Jurisdiction is also not automatic. The Court needs a valid jurisdictional basis, such as consent under a treaty or another recognized basis of jurisdiction.

Sanctions can happen without a criminal conviction

Governments can also impose targeted sanctions independently of a criminal trial.

Depending on national law, measures can include asset freezes, travel restrictions or restrictions on dealings with specified individuals and entities. These measures can create consequences even when a criminal court cannot immediately obtain jurisdiction.

But sanctions should not be confused with adjudication.

Being sanctioned is not the same as being convicted of a war crime. Sanctions are executive or political measures governed by the legal framework of the imposing state.

They can nevertheless become part of a broader accountability strategy, particularly when prosecutors are still building cases.

Evidence preservation may be the most important immediate step

The passage of time is one of the biggest threats to accountability.

Witnesses may leave the country. Records can be destroyed. Digital material can disappear. Military personnel may be reassigned. Satellite imagery can become harder to obtain. Memories change.

This explains why the Human Rights Council’s mandate emphasized documenting, verifying, consolidating and preserving evidence.

The earlier Iran fact-finding mission also proposed continuing international documentation after its mandate ended, including investigation of alleged perpetrators and preservation of evidence for legal proceedings.

For victims, this can appear frustratingly indirect. Preserving evidence does not deliver an immediate judgment or compensation.

But legally, it can determine whether a case remains possible years later.

Reparations are another form of accountability

Accountability does not necessarily begin with a prosecution.

Victims and families may seek compensation, rehabilitation, restoration of rights, truth about what happened or guarantees intended to prevent recurrence.

The UN’s earlier work on Iran specifically identified reparations as part of the broader accountability process and proposed international assistance mechanisms, including consideration of a victims’ fund.

The practical difficulty is implementation.

A reparations program requires identifying victims, establishing eligibility, determining responsibility or funding, and creating a mechanism capable of distributing assistance. Where the alleged perpetrator is a state that rejects the findings, enforcement becomes substantially more difficult.

What the UN itself can and cannot do

The phrase “UN findings” can create the impression that the United Nations has issued a judgment.

It has not.

The Human Rights Council can establish investigative mechanisms, receive reports, debate findings and adopt resolutions. UN bodies can document alleged violations and preserve evidence. They can recommend accountability measures and increase diplomatic pressure.

But a fact-finding mission does not have police powers comparable to a national law-enforcement agency. It cannot simply arrest an American pilot or Iranian security official and put that person on trial.

The UN’s institutional structure also matters. The Security Council has enforcement powers that the Human Rights Council does not possess, but Council action can be blocked by a veto from one of the five permanent members.

That division between investigation and enforcement is one of the central reasons international accountability can take years.

The hardest problem is turning a finding into an individual case

The gap between an atrocity finding and a criminal conviction can be summarized as a chain:

Incident → evidence → legal characterization → identification of suspects → jurisdiction → admissibility → arrest → prosecution → trial → judgment → enforcement.

A weakness at any point can stop the process.

The Minab finding, for example, raises questions about the target, available intelligence, verification procedures and decision-making chain. To prosecute a particular individual, investigators would need to connect that evidence to that person’s legally relevant conduct and mental state.

The same is true of the allegations against Iranian authorities. A finding that abuses were widespread or systematic is not necessarily enough to establish the liability of every person working for the state.

This is why accountability processes often appear slower than public expectations.

Political obstacles are unavoidable, but they are not the same as legal questions

International criminal accountability exists within a political system.

States control access to evidence and territory. Governments decide whether to cooperate with investigators. The Security Council operates through a veto system. National prosecutors operate under domestic law. Suspects may remain outside countries willing to prosecute them.

But these political obstacles should not be confused with the legal question of whether conduct violated international law.

The two questions are separate:

Was a law broken?
That is a legal and evidentiary question.

Can a particular institution actually prosecute the person responsible?
That is a jurisdictional, institutional and practical question.

The UN findings principally advance the first question by assembling evidence and making investigative conclusions. Whether they produce the second depends on what governments, prosecutors and courts do with that material.

Why the findings can matter even without an immediate prosecution

A report does not need to produce an arrest warrant tomorrow to have lasting legal significance.

International investigations can create a common evidentiary record. They can identify patterns that national investigators might otherwise examine in isolation. They can preserve testimony before witnesses become unavailable. And they can identify individuals, units and decision-making structures for future investigation.

That is particularly significant in Iran, where the UN’s previous investigations have documented what they described as persistent impunity and inadequate domestic avenues for redress. The 2025 fact-finding mission said domestic accountability mechanisms remained inadequate and proposed continuing international documentation and investigation outside the country where necessary.

The current findings can therefore become part of a longer accountability record rather than a self-contained legal endpoint.

What could actually happen next

The practical next steps are likely to fall into several tracks rather than a single international prosecution.

First, the UN findings can be presented to the Human Rights Council and become part of the public international record. Further states may call for investigations or accountability measures.

Second, governments with relevant jurisdiction could examine the evidence for domestic or extraterritorial proceedings.

Third, prosecutors and investigators can seek additional evidence needed to move from allegations concerning military operations or state repression to cases against identifiable individuals.

Fourth, states can use targeted sanctions or other measures independently of criminal proceedings.

Fifth, evidence can continue to be preserved for future judicial processes even if immediate prosecution is impossible.

The possibility of an ICC case remains legally distinct and would require a valid jurisdictional route under the Rome Statute.

The accountability question is bigger than one report

The September 2026 findings do not automatically produce criminal liability for either the United States or Iran, and they do not establish guilt of particular individuals in a court of law. They do, however, add a significant investigative record to an already extensive body of UN work concerning Iran and alleged violations of international law.

The most consequential question now is whether that record can be converted into jurisdiction, admissible evidence and identifiable defendants.

For Iran’s alleged crimes against humanity, that may mean continuing documentation and pursuing cases outside Iran where domestic accountability is unavailable. For the alleged U.S. strikes, it may mean determining whether independent investigations can establish what decision-makers knew, what precautions were taken and whether particular conduct meets the elements of a prosecutable offense.

The legal significance of the UN findings will ultimately be measured not by the force of the report’s language but by whether its evidence survives scrutiny and remains available when a court, prosecutor or other accountability mechanism has the jurisdiction and institutional capacity to act.