Nitrogen Gas Was Sold as a Humane Execution. A Court Just Ruled It Cruel and Chose a Firing Squad.

On Tuesday, a federal judge in Alabama did something the state had spent more than two years insisting was unnecessary. U.S. District Judge Emily C. Marks ruled that putting Jeffery Lee to death with nitrogen gas would be cruel and unusual punishment, and she barred the state from doing it. Lee, an Alabama death-row inmate, had been scheduled to die this week.

What makes the ruling worth a country’s attention is not just that a judge stopped an execution. It is the reasoning underneath it, and the alternative the court was willing to accept instead. Alabama built its nitrogen program on a single promise: that flooding a sealed mask with nitrogen would render a condemned man unconscious in seconds and kill him without pain. The evidence assembled since the first nitrogen execution in January 2024 has steadily dismantled that promise. Now a federal appeals court has agreed it doesn’t hold. And the method the court treated as the more humane option is a firing squad. When the merciful choice on the table is a rifle squad, the long search for a clean, modern way to kill people has reached its honest conclusion: there isn’t one.

What the court actually found

The path to Tuesday’s order ran through the first federal bench trial to put nitrogen hypoxia itself on the stand. In late May, Judge Marks initially ruled against Lee, finding he had not proven the protocol inflicts more suffering than is inherent in any execution. The Eleventh U.S. Circuit Court of Appeals reversed her. A three-judge panel found that Lee had shown the protocol presents a “substantial risk of serious harm” under the Eighth Amendment, describing a period of “air hunger” lasting one to three minutes that sits “over and above” the stress that accompanies any execution. The panel called the roughly three minutes it can take to lose awareness an “intolerable” span given the suffering likely involved, and sent the case back to Marks to weigh Lee’s proposed alternative.

That alternative was a firing squad. On remand, Marks concluded it could be carried out and would significantly reduce the risk of pain compared with nitrogen hypoxia, and she entered the injunction. This is not a fringe court or an abolitionist crusade. It is a Republican-appointed district judge and a conservative appeals circuit looking hard at the actual mechanics of the method and flinching.

The promise that didn’t survive the evidence

Alabama sold nitrogen hypoxia to the courts and the public as the gentle answer to lethal injection’s botched-IV problem. State attorneys assured judges the condemned would be unconscious within seconds. Then they used it on Kenneth Eugene Smith on January 25, 2024, the first nitrogen execution carried out anywhere.

It did not look like falling asleep. Witnesses reported that Smith appeared conscious for several minutes, that he “shook and writhed” against the gurney restraints and gasped, and that the process stretched well beyond 20 minutes. United Nations human-rights experts said they were “horrified” and warned the method could amount to torture. The state’s response to a death that contradicted its own sworn assurances was to keep going, carrying out more nitrogen executions and treating the visible distress as within the bounds of a constitutional killing.

That is the context the Eleventh Circuit finally credited. For two years, the gap between what Alabama promised and what witnesses described was waved away as the unavoidable unpleasantness of capital punishment. The appeals court looked at the same record and drew the line the state refused to draw itself. A method does not become humane because the people running it keep saying so.

When a firing squad is the merciful option

Here is the part that should unsettle supporters and opponents of the death penalty alike. The court did not free Lee or end his sentence. It told Alabama to shoot him instead, because bullets are less cruel than gas.

There is a grim logic to it. A firing squad is fast and, done correctly, near-instant. That is precisely why several states have quietly added it back to their menus, and why the Trump Justice Department moved last year to authorize firing squads, electrocution, and gas asphyxiation for federal executions. It’s part of a national turn toward restarting and expanding executions that has run well ahead of any settled answer on how to carry them out. But step back from the legal mechanics and look at what’s actually being decided. The state has spent years and considerable ingenuity trying to engineer an execution that doesn’t look like violence, and a court has now ruled that the visibly violent method is the kinder one. The whole project of dressing capital punishment in medical gowns — the gurney, the IV lines, the gas mask, the language of “protocols” — exists to make the act easier to watch and easier to authorize. The nitrogen ruling strips that costume off. If the most defensible way to carry out a death sentence is a rifle squad, the machinery of the “humane execution” was always theater.

That is the argument worth making today, and it does not require believing the death penalty should be abolished tomorrow. It requires being honest that every attempt to find a painless method has failed in turn. The electric chair, the gas chamber, the three-drug cocktail, and now nitrogen: the failures keep arriving with the same pattern, a confident promise, a disturbing execution, a round of litigation, and a search for the next clean-sounding method. A policy that depends on a euphemism it can’t deliver is a policy the courts are right to keep stopping.

The counterargument

The strongest case against Tuesday’s ruling is not that nitrogen is pleasant. It’s that the Constitution has never guaranteed a painless death. The Supreme Court said as much in Bucklew v. Precythe in 2019, holding that the Eighth Amendment bars only the gratuitous infliction of pain, not all of it, and that a prisoner challenging a method generally must point to an available alternative that substantially reduces the risk. Lee did exactly that, which is part of why he prevailed. But the same doctrine has let the high court repeatedly decline to halt nitrogen executions before now, and the state can fairly argue that some measure of distress does not make a method unconstitutional.

There is also the case for the victims. Lee and the others on Alabama’s death row were condemned for terrible crimes, and the families who waited years for a sentence to be carried out are owed something better than indefinite delay while the state cycles through methods. None of that is trivial, and an honest argument has to hold it. The answer is not to pretend the suffering isn’t real, but to recognize that a punishment the state cannot administer without either botching it or reverting to the firing squad is one the state has not figured out how to impose within the limits it claims to accept. The burden was always on the government to prove its method was humane. On nitrogen, it has now failed that test in a courtroom built to give it every benefit of the doubt.

What comes next

The fight isn’t over. Alabama Attorney General Steve Marshall’s office filed its appeal on Wednesday, and the case is a strong candidate to reach the U.S. Supreme Court, which has let nitrogen executions proceed before and may again. A reversal would put the method back in service. But even a reversal wouldn’t undo what the record now shows, or erase the moment a federal appeals court looked at three minutes of engineered suffocation and refused to call it acceptable. Alabama wanted nitrogen gas to be the future of the American execution. What it got instead was a court telling it to pick up a rifle, and a country that should finally ask why it keeps searching for a humane way to do something that never looks like one.