Eighth Amendment:
Excessive bail shall not be required, nor excessive fines imposed, nor cruel and unusual punishments inflicted.
The Court has grappled with several cases involving application of the death penalty to persons of diminished capacity. The first such case involved a defendant whose competency at the time of his offense, at trial, and at sentencing had not been questioned, but who subsequently developed a mental disorder. The Court held in Ford v. Wainwright1 that the Eighth Amendment prohibits the state from carrying out the death penalty on an individual who has a severe mental illness, and that properly raised issues of the individual's mental health at the time of execution must be determined in a proceeding satisfying the minimum requirements of due process.2 The Court noted that execution of persons with severe mental illness had been considered cruel and unusual at common law and at the time of adoption of the Bill of Rights, and continued to be so viewed. And, although no states purported to permit the execution of persons with severe mental illness, Florida and some others left the determination to the governor. Florida’s procedures, the Court held, violated due process because the decision was vested in the governor without the defendant's having the opportunity to be heard, the governor’s decision being based on reports of three state-appointed psychiatrists.3
The Court in Panetti v. Quarterman clarified when a prisoner’s current mental state can bar his execution under the rule of Ford.4 Relying on the understanding that the execution of a prisoner who cannot comprehend the reasons for his punishment offends both moral values and serves no retributive purpose,
the Court concluded that the operative test was whether a prisoner can reach a rational understanding for the reason for his execution.
5 Under Panetti, if a prisoner’s mental state is so distorted by mental illness that he cannot grasp the execution’s meaning and purpose
or the link between [his] crime and its punishment,
he cannot be executed.6
Twelve years after Panetti, the Court further clarified two aspects of the Ford-Panetti inquiry in Madison v. Alabama.7 First, on behalf of the Court, Justice Kagan concluded that a prisoner challenging his execution on the ground of a mental disorder cannot prevail merely because he cannot remember committing his crime.
8 Recognizing that a prisoner who can no longer remember a crime may yet recognize the retributive message society intends to convey with a death sentence,
the Court declined to impose a categorical rule prohibiting the execution of such a prisoner.9 Instead, Justice Kagan viewed a prisoner’s memory loss as a factor that a court may consider in determining whether he has a rational understanding
of the reason for his execution.10 Second, the Madison Court concluded that while Ford and Panetti pertained to prisoners suffering from psychotic delusions, the logic of those opinions extended to a prisoner who suffered from dementia.11 For the Court, the Ford-Panetti inquiry is not so much concerned with the precise cause for whether a prisoner can rationally understand why the state is seeking an execution and is instead focused on whether the prisoner’s mental condition has the effect of preventing such an understanding.12
In 1989, when first confronted with the issue of whether execution of the persons with intellectual disabilities is constitutional, the Court found insufficient evidence of a national consensus
against executing such people.13 In 2002, however, the Court determined in Atkins v. Virginia14 that much ha[d] changed
since 1989, that the practice had become truly unusual,
and that it was fair to say
that a national consensus
had developed against it.15 In 1989, only two states and the Federal Government prohibited execution of persons with intellectual disabilities while allowing executions generally. By 2002, an additional 16 states had prohibited execution of persons with intellectual disabilities, and no states had reinstated the power. But the important element of consensus, the Court explained, was not so much the number
of states that had acted, but instead the consistency of the direction of change.
16 The Court’s own evaluation of the issue
reinforced the consensus. Neither of the two generally recognized justifications for the death penalty—retribution and deterrence—applies with full force to mentally offenders with intellectual disabilities. Retribution necessarily depends on the culpability of the offender, yet intellectual disability reduces culpability. Deterrence is premised on the ability of offenders to control their behavior, yet the same cognitive and behavioral impairments that make these defendants less morally culpable . . . also make it less likely that they can process the information of the possibility of execution as a penalty and, as a result, control their conduct based on that information.
17
In Atkins, the Court wrote, [W]e leave to the State[s] the task of developing appropriate ways to enforce the constitutional restriction upon [their] execution of sentences.
18 In Schriro v. Smith, the Court again quoted this language, determining that the Ninth Circuit exceeded its authority in holding that Arizona courts were required to conduct a jury trial to resolve a defendant's claim that he was ineligible for the death penalty because of intellectual disability.19 States, the Court added, are entitled to adopt[ ] their own measures
for adjudicating claims of intellectual disability though those measures might, in their application, be subject to constitutional challenge.
20
In Hall v. Florida,21 however, the Court limited the states' ability to define intellectual disability by invalidating Florida's bright line
cutoff based on Intelligence Quotient (IQ) test scores. A Florida statute stated that anyone with an IQ above 70 was prohibited from offering additional evidence of mental disability and was thus subject to capital punishment.22 The Court invalidated this rigid standard, observing that [i]ntellectual disability is a condition, not a number.
23 The majority found that, although IQ scores are helpful in determining mental capabilities, they are imprecise in nature and may only be used as a factor of analysis in death penalty cases.24 This reasoning was buttressed by a consensus of mental health professionals who concluded that an IQ test score should be read not as a single fixed number, but as a range.25
Building on Hall, in Moore v. Texas the Supreme Court rejected the standards used by Texas state courts to evaluate whether a death row inmate was intellectually disabled, concluding that the standards created an unacceptable risk that persons with intellectual disability will be executed.
26 First, Justice Ginsburg, on behalf of the Court, held that a Texas court’s conclusion that a prisoner with an IQ score of 74 could be executed was irreconcilable with Hall
because the state court had failed to consider standard errors that are inherent in assessing intellectual disability.27 Second, the Moore Court determined that Texas deviated from prevailing clinical standards respecting the assessment of a death row inmate’s intellectual capabilities by (1) emphasizing the petitioner’s perceived adaptive strengths and his behavior in prison;28 (2) dismissing several traumatic experiences from the petitioner’s past;29 and (3) requiring the petitioner to show that his adaptive deficits were not due to a personality disorder or a mental health issue.30 Third, the Court criticized the prevailing standard used in Texas courts for assessing intellectual disability in death penalty cases, which had favored the ‘consensus of Texas citizens’ on who ‘should be exempted from the death penalty,’
with regard to those with mild
intellectual disabilities in the state’s capital system, concluding that those with even mild
levels of intellectual disability could not be executed under Atkins.31 Finally, Moore rejected the Texas courts’ skepticism of professional standards for assessing intellectual disability, standards that the state courts had viewed as being exceedingly subjective.
32 The Supreme Court instead held that lay stereotypes
(and not established professional standards) on an individual’s intellectual capabilities should spark skepticism.
33 As a result, following Hall and Moore, while the states retain some flexibility
in enforcing Atkins, the medical community’s prevailing standards appear to supply
a key constraint on the states in capital cases.34