Court considers nitrogen gas execution

The United States Supreme Court recently intervened in the ongoing legal debate surrounding nitrogen gas executions, declining to lift a lower court's injunction that blocked Alabama from executing Jeffery Lee using this method. This 6-3 decision, with Justices Thomas, Alito, and Gorsuch dissenting, marks a significant, albeit temporary, victory for opponents of nitrogen hypoxia, which a federal appeals court deemed to pose a "substantial risk of serious harm" and "severe pain over and above death itself." The ruling underscores the persistent Eighth Amendment challenges to novel execution protocols, particularly in states like Alabama that have pioneered the use of nitrogen gas amidst difficulties with traditional lethal injection drugs, and sets the stage for further judicial scrutiny of this controversial method.

The landscape of capital punishment in the United States continues to be reshaped by persistent legal challenges to execution methods, with nitrogen gas emerging as the latest flashpoint. In a pivotal development, the U.S. Supreme Court recently declined an urgent request from the State of Alabama to proceed with the execution of death row inmate Jeffery Lee by nitrogen hypoxia, upholding a lower court's finding that the method likely constitutes cruel and unusual punishment. This decision, delivered in a brief, unsigned order with three justices dissenting, highlights the profound constitutional questions surrounding the use of inert gas asphyxiation and its compliance with the Eighth Amendment.

Alabama has been at the forefront of adopting and implementing nitrogen gas as an execution method, a move spurred by the increasing difficulty in obtaining drugs for lethal injections. However, the state's pioneering efforts have been met with intense scrutiny and legal battles, particularly following the controversial execution of Kenneth Smith in January 2024, the first person in the world to be put to death by nitrogen hypoxia. The Supreme Court's latest action in the *Lee* case signals a renewed judicial willingness to scrutinize the humaneness of this method, potentially setting a precedent for its legality nationwide and impacting other states that have authorized its use.

Challenges to execution methods in the United States are primarily adjudicated under the Eighth Amendment to the Constitution, which prohibits cruel and unusual punishments. The Supreme Court's jurisprudence on this matter, notably articulated in *Baze v. Rees*, 553 U.S. 35 (2008), established a two-part test for inmates challenging an execution method: they must demonstrate that the method creates a "substantial risk of serious harm" and identify a "feasible, readily implemented" alternative method that significantly reduces this risk. This standard has been consistently applied to various methods, including lethal injection, which became the predominant form of execution in the late 20th century.

The shift towards nitrogen gas as an alternative method gained traction as states faced increasing difficulties in procuring the necessary drugs for lethal injections, largely due to pharmaceutical companies' reluctance to supply them for capital punishment. Alabama, in 2018, became the first state to authorize nitrogen hypoxia, followed by Arkansas, Louisiana, Mississippi, and Oklahoma. Proponents argued that nitrogen gas offered a more humane and painless death by inducing oxygen deprivation. However, these claims were immediately met with skepticism from medical professionals and human rights advocates, who warned of potential suffering and likened the method to human experimentation.

The recent Supreme Court order stems from the case of Jeffery Lee, an Alabama death row inmate scheduled for execution by nitrogen hypoxia. Lee's legal team mounted an Eighth Amendment challenge, arguing that Alabama's nitrogen protocol would inflict cruel and unusual punishment. A federal district court, presided over by Judge Emily Marks, initially found the method constitutional but later reversed course, ruling that Lee had shown by a "preponderance of the evidence that the Protocol constitutes cruel and unusual punishment in violation of the Eighth Amendment." This reversal followed an Eleventh Circuit Court of Appeals ruling that found Alabama's protocol presented a "substantial risk of serious harm—severe pain over and above death itself," particularly noting the "few minutes of air hunger" an inmate would likely experience.

Crucially, Lee also satisfied the second prong of the *Baze* test by proposing an alternative method: execution by firing squad, which the lower courts found to be a feasible and readily implemented alternative that would significantly reduce the risk of severe pain. Alabama appealed to the Supreme Court, arguing that the lower court's decision was an unprecedented ban on a legislatively enacted method and expanded the concept of cruelty beyond Eighth Amendment bounds. However, the Supreme Court, in a 6-3 vote, denied Alabama's request to lift the injunction, thereby allowing the lower court's block on Lee's execution to stand.

This outcome contrasts sharply with the Supreme Court's decision in January 2024, when it allowed Alabama to proceed with the execution of Kenneth Smith by nitrogen hypoxia, despite dissents from Justices Sonia Sotomayor, Elena Kagan, and Ketanji Brown Jackson, who raised grave concerns about the untested nature of the method and the potential for cruel and unusual punishment. Smith's execution, the first of its kind, was widely reported to be protracted and involve visible signs of distress, including thrashing, convulsing, and gasping for air. These eyewitness accounts, along with a subsequent execution in Louisiana, have fueled arguments that nitrogen hypoxia is far from the humane method its proponents claim. The *Lee* decision suggests that the Court, or at least a majority of its members, may be increasingly receptive to evidence of actual suffering and the availability of less painful alternatives when evaluating novel execution protocols.

The Supreme Court's decision to uphold the injunction against Jeffery Lee's nitrogen gas execution creates significant uncertainty for states that have adopted or are considering this method. While the ruling does not declare nitrogen hypoxia unconstitutional outright, it reinforces the rigorous Eighth Amendment standard that requires states to demonstrate that their chosen execution method does not pose a substantial risk of severe pain and that no feasible, less painful alternatives exist. The observed difficulties and reported suffering in previous nitrogen executions, particularly that of Kenneth Smith, will undoubtedly serve as crucial evidence in future legal challenges.

For practitioners, this development underscores the importance of thoroughly investigating and presenting evidence regarding the physiological and psychological effects of novel execution methods, as well as identifying viable alternatives. States like Alabama, Arkansas, Louisiana, Mississippi, and Oklahoma, which have legalized nitrogen gas, will likely face continued litigation and increased scrutiny of their protocols. The legal battle over nitrogen gas is far from over, and future Supreme Court engagements, potentially involving a full hearing on the merits of the method's constitutionality, are highly anticipated. The ultimate resolution will have profound implications for the future of capital punishment in the United States.