Nitrogen Gas vs. Firing Squad: The Supreme Court’s Rare Shift on Death Penalty Methods

The U.S. Supreme Court has temporarily blocked Alabama from executing Jeffery Lee by nitrogen gas asphyxiation, marking the first time in over five years the Court has refused to lift a lower court’s stay on an execution. The rare intervention in Lovelace v. Lee raises questions about whether the Court may finally reconsider its long-standing reluctance to strike down execution methods—even as states increasingly turn to unconventional lethal methods amid drug shortages and legal challenges.

Lee’s case hinges on whether Alabama’s planned nitrogen gas execution violates the Eighth Amendment’s ban on “cruel and unusual punishment.” Lower courts ruled in his favor, citing expert testimony that the method would cause prolonged consciousness and extreme suffering—contrasted with a firing squad, which experts said would induce unconsciousness within seconds. The Supreme Court’s brief order, issued late Thursday, leaves the lower court’s ruling in place while three justices—Clarence Thomas, Samuel Alito, and Neil Gorsuch—dissented, arguing the execution should proceed.

This development comes as death penalty states grapple with a crisis of execution methods. Since the 2010s, pharmaceutical companies have refused to supply drugs for lethal injections, forcing states to adopt alternatives like nitrogen gas, firing squads, and electric chairs. The Court’s decision, though temporary, suggests that even conservative justices may now entertain challenges to execution methods—though legal experts warn Lee’s path forward remains uncertain.

Why the Supreme Court’s Ruling Matters

The Court’s intervention in Lovelace v. Lee is legally significant for three reasons:

1. First constitutional challenge to a lethal method in decades: The Supreme Court has never ruled that a specific execution method violates the Eighth Amendment. Previous cases like Glossip v. Gross (2015) and Bucklew v. Precythe (2019) set a near-impossible standard for inmates to block executions, requiring proof of “superadd[ed] terror, pain, or disgrace”—a bar critics argue was designed to make such challenges unworkable.
2. Procedural loophole exploited: Lee’s legal team successfully argued that Alabama’s refusal to offer a firing squad—despite its availability in the state—meant nitrogen gas was the only option. Lower courts agreed, finding that the state’s failure to provide alternatives violated the Court’s own standards from Glossip.
3. Shadow docket surprise: The case reached the Court through its “shadow docket,” where emergency motions are often decided without full briefing or oral arguments. The temporary stay suggests even this expedited process can yield unexpected outcomes for death penalty cases.

According to SCOTUSblog, this is only the second time in the past decade the Court has denied a state’s request to lift a stay on an execution. The first occurred in 2019, when the Court blocked an Oklahoma execution over concerns about the inmate’s intellectual disability—a case later resolved without a Supreme Court ruling.

How Alabama’s Nitrogen Gas Method Became a Legal Battleground

Alabama adopted nitrogen gas as an execution method in 2022, following a trend among death penalty states to replace lethal injection amid drug shortages. The state’s protocol involves strapping a mask over the inmate’s face and filling it with pure nitrogen, which displaces oxygen in the bloodstream. Experts introduced in Lee’s case describe the process as agonizing:

“Air hunger”—the desperate sensation of suffocating while fully conscious—”can be far worse than pain,” testified Dr. Michael Mello, a Harvard medical ethics professor. “It ranks among the most distressing experiences humans can endure.”

—Lovelace v. Lee trial testimony, Law360

In contrast, firing squad executions—like those recently used in Utah and Oklahoma—typically induce unconsciousness within seconds by targeting the heart and major blood vessels. Lee’s attorneys argued that Alabama’s refusal to offer this alternative violated the Court’s precedent requiring states to avoid methods that “superadd terror, pain, or disgrace.”

Alabama’s defense countered that nitrogen gas is a “quick and humane” method, citing a 2023 study commissioned by the state that claimed consciousness lasts only 20–30 seconds. However, the study’s authors—including a former Oklahoma executioner—have faced criticism for potential conflicts of interest, as noted by The New York Times.

What Happens Next in Lee’s Case—and Beyond

The Supreme Court’s order is temporary, and Alabama’s attorney general has signaled the state will seek to reinstate the execution date. Legal analysts predict three possible outcomes:

• Reinstatement of the execution: If the Court denies Lee’s full appeal, Alabama could proceed with nitrogen gas, setting a precedent that states can use any method—even those causing severe suffering—as long as the inmate “consents.”
• Full review of the method: If the Court agrees to hear the case on the merits, it could issue its first ruling on an execution method since Bucklew (2019), potentially narrowing or expanding the standards for Eighth Amendment challenges.
• Broader implications for death penalty states: Even if Lee loses, other inmates may use his case to challenge their states’ execution methods. For example, Missouri and Mississippi have also adopted nitrogen gas, while Oklahoma and Utah have revived firing squads.

Meanwhile, the Court’s recent handling of Hamm v. Smith—a case testing whether inmates with intellectual disabilities can be executed—suggests a potential shift in conservative justices’ approach. In that case, the Court declined to overturn a lower court ruling that spared Smith from execution, despite the Republican majority’s historical support for the death penalty. “This is the first time in years we’ve seen the Court even entertain the idea that an execution method might violate the Constitution,” said Brennan Center for Justice legal director.

The Larger Context: Why States Are Abandoning Lethal Injection

Lee’s case reflects a broader crisis in the U.S. death penalty system. Since 2010, 30 states have faced shortages of lethal injection drugs, primarily due to:

• Pharmaceutical resistance: European drug manufacturers, including Germany’s Merck and France’s Sanofi, have refused to supply execution drugs, citing ethical concerns. The European Union also bans exports of drugs for capital punishment.
• Legal challenges: Inmates have successfully argued that botched executions—like Oklahoma’s 2014 lethal injection, where an inmate gasped for air for 43 minutes—violate the Eighth Amendment.
• State experimentation: At least eight states have now used alternatives to lethal injection, including:

Source: Death Penalty Information Center, 2024

The shift toward firing squads and nitrogen gas has drawn criticism from medical and legal experts. “States are essentially forcing inmates to choose between two cruel options,” said Death Penalty Information Center executive director Robert Dunham. “This isn’t about reform—it’s about avoiding lawsuits while still killing people.”

Who Stands to Gain—or Lose—from the Supreme Court’s Decision?

The outcome of Lovelace v. Lee will have ripple effects across three key groups:

1. Death row inmates: If the Court upholds Lee’s challenge, inmates in states using nitrogen gas or other unconventional methods could file similar lawsuits. However, legal experts note that the burden remains high: inmates must prove both that their state’s method causes “severe pain” and that an alternative exists.
2. Death penalty states: States like Alabama, which have invested in new execution methods, may face costly legal battles. For example, Oklahoma spent $1.5 million developing its nitrogen gas protocol, only to see it challenged in court.
3. Capital defense lawyers: The case offers a rare opportunity to test the limits of Glossip and Bucklew. “This is a moment where the Court could clarify whether its previous rulings were a genuine legal standard or a smokescreen,” said Lawfare contributor Jonathan Turley.

Public opinion may also play a role. A 2023 Pew Research Center survey found that 56% of Americans oppose the death penalty, up from 49% in 2016. The survey also revealed generational divides: 72% of adults under 30 oppose capital punishment, compared to 46% of those over 50.

Where to Find Official Updates on the Case

Readers seeking real-time developments can track the case through:

• Supreme Court docket for orders and filings.
• SCOTUSblog for expert analysis and brief summaries.
• Alabama Attorney General’s office for state responses.
• Death Penalty Information Center for broader trends in execution methods.

The next critical deadline is April 15, 2024, when the Supreme Court is expected to rule on whether to hear Lovelace v. Lee on the merits. If granted, oral arguments could be scheduled for June or September 2024.

This case is more than a legal technicality—it tests whether the Supreme Court’s conservative majority will allow states to experiment with execution methods without constitutional guardrails. For now, Jeffery Lee’s fate remains in limbo, but the broader implications for the death penalty’s future are clear: the Court’s silence on execution methods may soon end.

We welcome your insights on this developing story. Should the Supreme Court strike down an execution method for the first time, how would that change the landscape for capital punishment in the U.S.? Share your thoughts in the comments below or on Twitter.