Barr v. Lee
The Supreme Court lifted a last-minute injunction that had halted the federal government's first executions in nearly two decades, ruling that the death-row inmates had not shown they were likely to win their argument that the drug pentobarbital constitutes cruel and unusual punishment.
The decision allowed the executions to proceed as scheduled and signaled that courts should not routinely intervene at the final hour to block lawfully sentenced executions.
How it got here: A federal district court granted a preliminary injunction blocking four executions hours before the first was scheduled; the government applied directly to the Supreme Court to vacate that order.
The Case in Depth
What happened
Four federal inmates, all convicted of murdering children and sentenced to death in the late 1990s, challenged the government's plan to execute them using a single drug — pentobarbital sodium. They presented expert evidence claiming pentobarbital causes a form of severe respiratory distress — a sensation of drowning — before rendering a person unconscious. The government provided competing expert testimony that any such effect occurs only after death or full unconsciousness.
The question before the Court
Could a federal district court block the government's scheduled executions of four death-row inmates by ruling that the single-drug pentobarbital execution method likely causes unconstitutional pain and suffering?
The Court's answer
No — the district court should not have blocked the executions. To justify a preliminary injunction (a court order halting government action while a case proceeds), the challengers must show they are likely to win their underlying legal claim. The Court found they had not cleared that bar on their Eighth Amendment challenge.
The Court noted that no method of execution has ever been found to violate the Constitution's ban on cruel and unusual punishment, setting an exceptionally high threshold. Pentobarbital had been adopted by five states, used in over 100 executions without incident, upheld by multiple appeals courts, and even previously cited by death-row inmates as a preferred, less painful alternative. Competing expert evidence about whether pulmonary distress occurs before or after unconsciousness did not establish the likelihood of success needed to sustain a last-minute court intervention in a lawfully sentenced execution.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
Federal executions, paused for 17 years, could resume immediately. For the four inmates whose executions were scheduled within days, the ruling was final. For death-row inmates broadly, it reinforced how difficult it is to block an execution on the grounds that the chosen drug causes undue suffering, particularly when courts have repeatedly upheld that same drug.
What changes now
The vacatur of the injunction allowed the four scheduled executions to proceed immediately. The underlying litigation — including unresolved claims under the Administrative Procedure Act and other statutes — was not finally disposed of by this order. This was an emergency ruling on a preliminary injunction, not a final decision on the merits of the Eighth Amendment challenge to pentobarbital, which could still be litigated in future cases.
What this does not decide
The ruling does not decide whether pentobarbital constitutes cruel and unusual punishment — it only lifts the preliminary injunction that blocked the executions. The Court expressly left open whether a future challenge, more fully developed at trial, could ever succeed. Remaining statutory claims were also not addressed.
Concurrences and dissents
Dissent — Justice Breyer
Justice Breyer used the occasion to highlight broader constitutional problems with the death penalty: that Lee's co-defendant received life imprisonment for the same crime, that Lee had spent over 20 years on death row causing severe psychological suffering, and that the execution method itself raises serious constitutional questions. He renewed his call for the Court to directly examine whether the death penalty is constitutional at all.
Dissent — Justice Sotomayor
Justice Sotomayor argued the Court rushed to lift the injunction in response to what she called an artificial government claim of urgency, bypassing meaningful judicial review of a serious, fact-heavy constitutional challenge. She noted the ruling contradicted the Court's own order from seven months earlier in the same litigation, which had allowed time for appellate review. She warned that the Court's practice of granting the government's last-minute emergency applications — here resulting in irreversible harm — undermines the normal appellate process and the Court's role in safeguarding judicial review.
How the Court got there
The legal reasoning, step by step
- To block a government action with a preliminary injunction, the challengers must show they are likely to succeed on the merits of their legal claim. Here, the legal claim was that pentobarbital violates the Eighth Amendment's prohibition on cruel and unusual punishment — the Court's threshold question was whether that claim was strong enough to survive.
- The Court stressed that no method of execution has ever been found unconstitutional by the Supreme Court, meaning the bar for an Eighth Amendment method-of-execution claim is exceptionally high. States and the federal government have historically tried to make executions more humane by moving toward newer methods like lethal injection, not less.
- Pentobarbital had an extensive track record: adopted by five states as their execution drug, used in over 100 executions without reported incident, repeatedly proposed by prisoners in other cases as a less painful alternative to other protocols, and upheld in Bucklew v. Precythe (a 2019 decision) — even as applied to a prisoner whose medical condition could have made the drug more dangerous for him.
- The inmates' expert evidence that pentobarbital causes 'flash pulmonary edema' — a form of respiratory distress likened to drowning — was directly contradicted by government experts who testified that any such physical response occurs only after the prisoner has died or been fully rendered unconscious. With conflicting expert testimony and no factual finding yet, the challengers had not met the demanding standard for last-minute judicial intervention.
- The Court emphasized that last-minute stays of execution should be rare exceptions, not a routine tool. Courts have a responsibility to resolve method-of-execution challenges fairly and promptly, keeping the broader policy question of capital punishment with elected representatives rather than with judges.
Doctrinal impact
Cases affected by this decision
Reaffirms Bucklew v. Precythe (587 U. S. ___)
Reaffirmed as controlling authority that no execution method has ever been held unconstitutional and that last-minute stays should be rare.