Glossip v. Gross is a significant Supreme Court case from 2015 that addressed the constitutionality of a particular lethal injection protocol used in Oklahoma, focusing on claims of cruel and unusual punishment under the Eighth Amendment. This case raised questions about the adequacy of the drugs used in executions and whether their administration would result in unconstitutional suffering for the condemned. The ruling highlighted the balance between the state's interest in administering capital punishment and the rights of individuals facing execution.