Baze v. Rees

Justice Alito joined the plurality but emphasized that its alternative-procedure standard must account for practical constraints, especially professional ethical rules that bar physicians, nurses, and emergency medical personnel from participating in executions. A proposed safeguard is not feasible or readily available if it depends on participation by professionals whose governing ethics rules prohibit that participation.

He also read the plurality's test to require more than isolated expert testimony or a few studies. In his view, a prisoner should identify a well-established scientific consensus showing that a proposed modification would significantly reduce a substantial risk of severe pain. Otherwise, courts could transform uncertain and contested medical claims into a mechanism for prolonged execution litigation.

Justice Alito cautioned that vague standards focused on an "untoward" or avoidable risk would invite litigation gridlock and effectively frustrate capital punishment without directly deciding its constitutionality. The legality of execution methods, he maintained, should remain distinct from the broader moral and constitutional debate over the death penalty itself.

Justice Stevens concurred in the judgment because, under existing precedent and on the record before the Court, the petitioners had not proved that Kentucky's protocol violated the Eighth Amendment. He nevertheless believed the Court's decision left open serious questions about similar three-drug protocols in other States, particularly as fuller factual records developed.

He criticized the use of pancuronium bromide because it can mask signs that an insufficiently anesthetized inmate is conscious and in severe pain. In his view, the State's interests in preventing involuntary movements and producing a visually dignified execution were inadequate to justify that risk, particularly because Kentucky prohibited comparable paralytic drugs in animal euthanasia. He urged States to reconsider retaining the drug.

Justice Stevens also stated that his experience with capital cases had led him to conclude that the death penalty itself was unconstitutional. He questioned whether death serves valid goals of incapacitation, deterrence, or retribution in light of life-without-parole alternatives, uncertain deterrence evidence, discriminatory application, wrongful-conviction risks, and the extraordinary costs of capital litigation. But he regarded prior decisions upholding capital punishment as binding and therefore did not vote to invalidate Kentucky's protocol.

Justice Scalia joined Justice Thomas's concurrence in the judgment and separately responded to Justice Stevens's criticism of capital punishment. He argued that the Constitution's text expressly contemplates capital crimes and deprivation of life with due process, leaving the policy judgment about the death penalty primarily to democratic legislatures rather than judges.

He rejected Justice Stevens's conclusion that the death penalty lacks a legitimate penological purpose. Disputes about deterrence, retribution, jury selection, error, and discrimination, Justice Scalia maintained, are matters of contested policy and empirical judgment that do not authorize the Court to declare a constitutionally recognized punishment invalid on the basis of a Justice's personal assessment.

In Justice Scalia's view, relying on a Justice's own experience and moral judgment to invalidate capital punishment exemplifies rule by judicial fiat. The death penalty's value is deeply debated, which for him was a reason to leave the issue to the political process rather than constitutional adjudication.

Justice Thomas concurred only in the judgment because he rejected the plurality's risk-based standard. In his view, the original understanding of the Cruel and Unusual Punishments Clause prohibits execution methods deliberately designed to inflict pain beyond that necessary to cause death, such as burning at the stake, disemboweling, drawing and quartering, or other torturous enhancements of a death sentence.

He read Wilkerson, Kemmler, and Resweber as consistently focusing on whether a punishment was intentionally torturous or involved a purpose to inflict unnecessary pain. Those decisions did not require courts to compare execution methods, identify the least painful alternative, or regulate safeguards against accidental errors.

Justice Thomas warned that the plurality's test would generate continual litigation over whether a risk is substantial, an alternative is feasible, or a reduction in risk is significant. It would also force courts without medical or scientific expertise to decide technical disputes over execution procedures.

Kentucky adopted lethal injection to make execution more humane, not to add terror or pain to the death sentence. Because its protocol was designed to produce a swift and painless death, and the alleged danger was negligent implementation rather than purposeful torture, Justice Thomas concluded that the Eighth Amendment challenge failed.

Justice Breyer concurred in the judgment and generally agreed with Justice Ginsburg that the inquiry should consider the severity and likelihood of pain together with the availability of alternatives. He believed the decisive question was whether the protocol creates an untoward, readily avoidable risk of severe and unnecessary suffering.

The available evidence did not satisfy him that Kentucky's protocol posed such a risk. He found the much-cited Lancet study on postmortem thiopental levels too scientifically disputed to carry significant weight, particularly because postmortem drug concentrations may not accurately indicate the inmate's anesthetic state during life.

Professor Denno's research on botched executions raised legitimate concerns, but Justice Breyer concluded that Kentucky's trained IV personnel and observation procedures addressed the types of problems documented in that research. He also found uncertainty in the evidence concerning purported alternatives, including the use of pancuronium bromide and the feasibility of obtaining more medically trained execution personnel.

Justice Breyer agreed that Kentucky might improve its consciousness checks, but concluded that the record did not show those measures would make a significant practical difference. He stressed that serious concerns about the death penalty generally were not before the Court in this method-of-execution challenge.

Justice Ginsburg, joined by Justice Souter, would have vacated and remanded. She agreed that administering pancuronium bromide and potassium chloride to a conscious inmate would cause constitutionally unacceptable pain: paralysis would produce slow asphyxiation, while potassium chloride would cause intense burning pain. The central question was therefore whether Kentucky adequately ensured unconsciousness before administering those drugs.

She would assess the degree of risk, the magnitude of the potential pain, and the availability of feasible alternatives together rather than require a fixed threshold of substantial risk. Even a relatively low probability of error matters greatly when the possible consequence is undetectable, excruciating suffering. Readily available measures that materially reduce that danger should be required under contemporary standards of decency.

Kentucky used trained personnel to establish IV access, but once the IV team left the chamber, nonmedical officials relied only on visual observation. The protocol did not pause automatically, require a meaningful consciousness test, or use available monitoring tools such as blood-pressure or heart-rate measurements. Because pancuronium would prevent all voluntary movement, an inmate who remained conscious after its injection could not communicate pain.

Other States used simple safeguards that Kentucky omitted, including calling the inmate's name, shaking the inmate, testing the eyelash reflex, applying a noxious stimulus, physically examining the inmate, or delaying the second and third drugs after the anesthetic. These measures were inexpensive and easily implemented, yet could materially reduce the possibility that the inmate would be conscious during the painful final stages.

Justice Ginsburg rejected Kentucky's assertion that an inadequately anesthetized inmate would necessarily be awake and screaming. An inmate might receive enough thiopental to mask obvious signs of consciousness but not enough to achieve a surgical plane of anesthesia, and Kentucky's protocol did not specify an injection rate. She would have required the lower courts to determine whether Kentucky's failure to use available consciousness safeguards, combined with the rest of its protocol, created an untoward and readily avoidable risk of severe pain.