Page:Russell Bucklew v. Anne L. Precythe, Director, Missouri Department of Corrections.pdf/16

Rh op., at 3); Baze, 553 U. S., at 42, 62; see also Banner 178–181, 196–197, 297. Notably, all of these innovations occurred not through this Court’s intervention, but through the initiative of the people and their representatives.

Still, accepting the possibility that a State might try to carry out an execution in an impermissibly cruel and unusual manner, how can a court determine when a State has crossed the line? ’s opinion in Baze, which a majority of the Court held to be controlling in Glossip, supplies critical guidance. It teaches that where (as here) the question in dispute is whether the State’s chosen method of execution cruelly superadds pain to the death sentence, a prisoner must show a feasible and readily implemented alternative method of execution that would significantly reduce a substantial risk of severe pain and that the State has refused to adopt without a legitimate penological reason. See Glossip, 576 U. S., at ___–___ (slip op., at 12–13); Baze, 553 U. S., at 52. Glossip left no doubt that this standard governs “all Eighth Amendment method-of-execution claims.” 576 U. S., at ___ (slip op., at 1).

In reaching this conclusion, Baze and Glossip recognized that the Eighth Amendment “does not demand the avoidance of all risk of pain in carrying out executions.” Baze, 553 U. S., at 47. To the contrary, the Constitution affords a “measure of deference to a State’s choice of execution procedures” and does not authorize courts to serve as “boards of inquiry charged with determining ‘best practices’ for executions.” Id., at 51–52, and nn. 2–3. The Eighth Amendment does not come into play unless the risk of pain associated with the State’s method is “substantial when compared to a known and available alternative.” Glossip, 576 U. S., at ___ (slip op., at 13); see Baze, 553 U. S., at 61. Nor do Baze and Glossip suggest that traditionally accepted methods of execution—such as hanging, the firing squad, electrocution, and lethal injection—are