3 Justices Dissent as Supreme Court Blocks Nitrogen Execution, Citing 3-Minute Suffering Window

For legal and regulatory professionals, the decision underscores the enduring tension between state execution protocols and evolving constitutional standards of humaneness. The divided bench and the lower courts’ application of the Glossip test create fresh uncertainty for capital punishment procedures nationwide, especially as nitrogen gas gains traction as an alternative to lethal injection.

The U.S. Supreme Court, in a late-night unsigned order, refused to lift a lower court’s injunction blocking Alabama from executing death row inmate Jeffery Lee using nitrogen hypoxia, marking a significant development in the ongoing legal battle over the constitutionality of novel execution methods. The decision came just hours before Lee’s scheduled execution on Thursday, June 12, 2026, and effectively quashed Alabama’s emergency appeal to proceed with what would have been the nation’s ninth nitrogen gas execution. Justices Clarence Thomas, Samuel Alito, and Neil Gorsuch indicated they would have granted the state’s request, underscoring the deep fissures on the Court regarding the Eighth Amendment’s prohibition against cruel and unusual punishment in the context of capital punishment protocols.

“

District Judge Emily Marks initially ruled that Alabama’s nitrogen-hypoxia protocol passed constitutional muster.

The legal back-and-forth began in May 2026, when U.S. District Judge Emily Marks initially ruled that Alabama’s nitrogen-hypoxia protocol passed constitutional muster. However, on Monday, June 8, a three-judge panel of the 11th U.S. Circuit Court of Appeals reversed that decision in a scathing opinion, focusing on the finding that the nitrogen method could take up to three minutes for an inmate to lose awareness—a window the panel described as “intolerable” given the likely suffering. On Tuesday, Judge Marks, now bound by the appellate ruling, reevaluated the case and permanently enjoined the state from executing Lee with nitrogen gas. She explicitly clarified that her injunction did not bar execution altogether, emphasizing that Lee had satisfied the Supreme Court’s death-penalty precedent by identifying an alternative method—firing squad—that is feasible, readily implemented, and would “significantly reduce a substantial risk of severe pain.”

This legal framework traces back to the Glossip v. Gross (2015) decision, where the Supreme Court held that inmates challenging a state’s execution method must demonstrate that a known and available alternative method exists that would significantly reduce a substantial risk of severe pain. Alabama’s attorneys argued that Lee’s identification of the firing squad was impractical on such short notice and that the state’s scheduling of the execution should have effectively mooted his claim. But the district court and the appeals court disagreed, finding that the Eighth Amendment cannot be subordinate to an execution timetable. Judge Marks noted that the state had not shown it could not implement the firing squad within a reasonable timeframe, rebuffing Alabama’s argument about the difficulty of finding willing executioners.

The implications of this ruling extend well beyond Jeffery Lee’s individual case. Nitrogen gas has been increasingly adopted as a supposedly more humane alternative to lethal injection, which itself has been plagued by botched procedures and drug-supply shortages. Alabama first used nitrogen in 2024, and seven of the eight executions performed with the method nationwide have occurred there, with Louisiana carrying out the other. The 11th Circuit’s ruling injects new uncertainty into the acceptability of nitrogen hypoxia, establishing an appellate-level standard that the duration of the procedure—and the suffering during loss of awareness—can render it unconstitutional. This could embolden challenges in other states considering the method.