The Eighth Amendment to the United States Constitution protects against imposing excessive bail, excessive fines, or cruel and unusual punishments. This amendment was adopted on December 15, 1791, along with the rest of the United States Bill of Rights. The amendment serves as a limitation upon the federal government to impose unduly harsh penalties on criminal defendants before and after a conviction. This limitation applies equally to the price for obtaining pretrial release and the punishment for crime after conviction. The phrases in this amendment originated in the English Bill of Rights of 1689.
Gregg v. Georgia, Proffitt v. Florida, Jurek v. Texas, Woodson v. North Carolina, and Roberts v. Louisiana, 428 U.S. 153 (1976), is a landmark decision of the U.S. Supreme Court. It reaffirmed the Court's acceptance of the use of the death penalty in the United States, upholding, in particular, the death sentence imposed on Troy Leon Gregg. The case is referred to by a leading scholar as the July 2 Cases, and elsewhere referred to by the lead case Gregg. The court set forth the two main features that capital sentencing procedures must employ in order to comply with the Eighth Amendment ban on "cruel and unusual punishments". The decision essentially ended the de facto moratorium on the death penalty imposed by the Court in its 1972 decision in Furman v. Georgia 408 U.S. 238 (1972).
Roper v. Simmons, 543 U.S. 551 (2005), was a landmark decision in which the Supreme Court of the United States held that it is unconstitutional to impose capital punishment for crimes committed while under the age of 18. The 5–4 decision overruled Stanford v. Kentucky, in which the court had upheld execution of offenders at or above age 16, and overturned statutes in 25 states.
Atkins v. Virginia, 536 U.S. 304 (2002), is a case in which the Supreme Court of the United States ruled 6-3 that executing people with intellectual disabilities violates the Eighth Amendment's ban on cruel and unusual punishments, but states can define who has an intellectual disability. At the time Atkins was decided, just 18 of the 38 death penalty states exempted intellectually disabled offenders from the death penalty.
Thompson v. Oklahoma, 487 U.S. 815 (1988), was the first case since the moratorium on capital punishment was lifted in the United States in which the U.S. Supreme Court overturned the death sentence of a minor on grounds of "cruel and unusual punishment." The holding in Thompson was expanded on by Roper v. Simmons (2005), where the Supreme Court extended the "evolving standards" rationale to those under 18 years old.
Wrongful execution is a miscarriage of justice occurring when an innocent person is put to death by capital punishment. Cases of wrongful execution are cited as an argument by opponents of capital punishment, while proponents say that the argument of innocence concerns the credibility of the justice system as a whole and does not solely undermine the use of the death penalty.
Johnny Paul Penry is a Texas prisoner serving three consecutive sentences of life imprisonment without parole for rape and murder. He was on death row between 1980 and 2008, and his case generated discussion about the appropriateness of the death penalty for offenders who are thought to be intellectually disabled.
Walton v. Arizona, 497 U.S. 639 (1990), was a United States Supreme Court case that upheld two important aspects of the capital sentencing scheme in Arizona—judicial sentencing and the aggravating factor "especially heinous, cruel, or depraved"—as not unconstitutionally vague. The Court overruled the first of these holdings in Ring v. Arizona, 536 U.S. 584 (2002). The second of these holdings has yet to be overturned.
Stanford v. Kentucky, 492 U.S. 361 (1989), was a United States Supreme Court case that sanctioned the imposition of the death penalty on offenders who were at least 16 years of age at the time of the crime. This decision came one year after Thompson v. Oklahoma, in which the Court had held that a 15-year-old offender could not be executed because to do so would constitute cruel and unusual punishment. In 2003, the Governor of Kentucky Paul E. Patton commuted the death sentence of Kevin Stanford, an action followed by the Supreme Court two years later in Roper v. Simmons overruling Stanford and holding that all juvenile offenders are exempt from the death penalty.
Ford v. Wainwright, 477 U.S. 399 (1986), was a landmark U.S. Supreme Court case that upheld the common law rule that the insane cannot be executed; therefore the petitioner is entitled to a competency evaluation and to an evidentiary hearing in court on the question of their competency to be executed.
In criminal law, a mitigating factor, also known as an extenuating circumstance, is any information or evidence presented to the court regarding the defendant or the circumstances of the crime that might result in reduced charges or a lesser sentence. Unlike a legal defense, the presentation of mitigating factors will not result in the acquittal of a defendant. The opposite of a mitigating factor is an aggravating factor.
Bigby v. Dretke 402 F.3d 551, the U.S. Court of Appeals for the Fifth Circuit heard a case appealed from the United States District Court for the Northern District of Texas on the issue of the instructions given to a jury in death penalty sentencing. The decision took into account the recent United States Supreme Court decisions concerning the relevance of mitigating evidence in sentencing, as in Penry v. Lynaugh.
Tennard v. Dretke, 542 U.S. 274 (2004), was a United States Supreme Court case in which the court was asked whether evidence of the defendant's low IQ in a death penalty trial had been adequately presented to the jury for full consideration in the penalty phase of his trial. The Supreme Court held that not considering a defendant's low IQ would breach his Eighth Amendment rights and constitute a cruel and unusual punishment.
Kennedy v. Louisiana, 554 U.S. 407 (2008), is a landmark decision by the Supreme Court of the United States that held that the Eighth Amendment's Cruel and Unusual Punishments Clause prohibits imposing the death penalty for the rape of a child in cases where the victim did not die and death was not intended.
Lockett v. Ohio, 438 U.S. 586 (1978), is a United States Supreme Court case in which the Court held that sentencing authorities must have the discretion to consider at least some mitigating factors, rather than being limited to a specific list of factors.
Penry v. Johnson, 532 U.S. 782 (2001), is a United States Supreme Court case which concerned whether instructions given to a Texas jury were constitutionally adequate to emphasize the mitigating factors in sentencing of defendants who are intellectually disabled The Texas courts had determined the sentencing instructions were consistent with prior Supreme Court jurisprudence, but the Court in a divided decision reversed, finding the sentencing instructions insufficient. This was the second time Penry's case made it to the Supreme Court.
The United States Constitution contains several provisions related to criminal sentencing.
Hall v. Florida, 572 U.S. 701 (2014), was a United States Supreme Court case in which the Court held that a bright-line IQ threshold requirement for determining whether someone has an intellectual disability is unconstitutional in deciding whether they are eligible for the death penalty.
Moore v. Texas, 137 S. Ct. 1039 (2017), is a United States Supreme Court decision about the death penalty and intellectual disability. The court held that contemporary clinical standards determine what an intellectual disability is, and held that even milder forms of intellectual disability may bar a person from being sentenced to death due to the Eighth Amendment's prohibition against cruel and unusual punishment. The case clarified two earlier cases, Atkins v. Virginia (2002) and Hall v. Florida (2014).
