Page:Russell Bucklew v. Anne L. Precythe, Director, Missouri Department of Corrections.pdf/10

Rh the State’s motion for summary judgment. By this point in the proceedings, Mr. Bucklew’s contentions about the pain he might suffer had evolved considerably. He no longer complained about circulation of the drug, the use of dye, or adverse drug interactions. Instead, his main claim now was that he would experience pain during the period after the pentobarbital started to take effect but before it rendered him fully unconscious. According to his expert, Dr. Joel Zivot, while in this semiconscious “twilight stage” Mr. Bucklew would be unable to prevent his tumors from obstructing his breathing, which would make him feel like he was suffocating. Dr. Zivot declined to say how long this twilight stage would last. When pressed, however, he referenced a study on euthanasia in horses. He claimed that the horses in the study had displayed some amount of brain activity, as measured with an electroencephalogram (or EEG), for up to four minutes after they were given a large dose of pentobarbital. Based on Dr. Zivot’s testimony, the district court found a triable issue as to whether there was a “substantial risk” that Mr. Bucklew would “experience choking and an inability to breathe for up to four minutes” if he were executed by lethal injection. App. 827. Even so, the court held, Mr. Bucklew’s claim failed because he had produced no evidence that his proposed alternative, execution by nitrogen hypoxia, would significantly reduce that risk.

This time, a panel of the Eighth Circuit affirmed. The panel held that Mr. Bucklew had produced no evidence that the risk of pain he alleged “would be substantially reduced by use of nitrogen hypoxia instead of lethal injection as the method of execution.” 883 F. 3d, at 1096. Judge Colloton dissented, arguing that the evidence raised a triable issue as to whether nitrogen gas would “render Bucklew insensate more quickly than pentobarbital.” Id., at 1099. The full court denied rehearing en banc over a dissent by Judge Kelly, who maintained that, while