The insanity defense, also known as the mental disorder defense, is an affirmative defense by excuse in a criminal case, arguing that the defendant is not responsible for their actions due to a psychiatric disease at the time of the criminal act. This is contrasted with an excuse of provocation, in which the defendant is responsible, but the responsibility is lessened due to a temporary mental state. It is also contrasted with the justification of self defense or with the mitigation of imperfect self-defense. The insanity defense is also contrasted with a finding that a defendant cannot stand trial in a criminal case because a mental disease prevents them from effectively assisting counsel, from a civil finding in trusts and estates where a will is nullified because it was made when a mental disorder prevented a testator from recognizing the natural objects of their bounty, and from involuntary civil commitment to a mental institution, when anyone is found to be gravely disabled or to be a danger to themself or to others.
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).
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 mentally retarded offenders from the death penalty.
Herrera v. Collins, 506 U.S. 390 (1993), was a case in which the Supreme Court of the United States ruled by 6 votes to 3 that a claim of actual innocence does not entitle a petitioner to federal habeas corpus relief by way of the Eighth Amendment's ban on cruel and unusual punishment.
In United States and Canadian law, competence concerns the mental capacity of an individual to participate in legal proceedings or transactions, and the mental condition a person must have to be responsible for his or her decisions or acts. Competence is an attribute that is decision-specific. Depending on various factors which typically revolve around mental function integrity, an individual may or may not be competent to make a particular medical decision, a particular contractual agreement, to execute an effective deed to real property, or to execute a will having certain terms.
Wrongful execution is a miscarriage of justice occurring when an innocent person is killed 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.
Hill v. McDonough, 547 U.S. 573 (2006), was a United States Supreme Court case challenging the use of lethal injection as a form of execution in the state of Florida. The Court ruled unanimously that a challenge to the method of execution as violating the Eighth Amendment to the United States Constitution properly raised a claim under 42 U.S.C. § 1983, which provides a cause of action for civil rights violations, rather than under the habeas corpus provisions. Accordingly, that the prisoner had previously sought habeas relief could not bar the present challenge.
Penry v. Lynaugh, 492 U.S. 302 (1989), was a United States Supreme Court case that sanctioned the death penalty for mentally disabled offenders because the Court determined executing the mentally disabled was not "cruel and unusual punishment" under the Eighth Amendment. However, because Texas law did not allow the jury to give adequate consideration as a mitigating factor to Johnny Paul Penry's intellectual disability at the sentencing phase of his murder trial, the Court remanded the case for further proceedings. Eventually, Penry was retried for capital murder, again sentenced to death, and again the Supreme Court ruled, in Penry v. Johnson, that the jury was not able to adequately consider Penry's intellectual disability as a mitigating factor at the sentencing phase of the trial. Ultimately, Penry was spared the death penalty because of the Supreme Court's ruling in Atkins v. Virginia, which, while not directly overruling the holding in "Penry I", did give considerable negative treatment to Penry on the basis that the Eighth Amendment allowed execution of mentally disabled people.
Panetti v. Quarterman, 551 U.S. 930 (2007), is a decision by the Supreme Court of the United States, ruling that criminal defendants sentenced to death may not be executed if they do not understand the reason for their imminent execution, and that once the state has set an execution date death-row inmates may litigate their competency to be executed in habeas corpus proceedings. This decision reaffirmed the Court's prior holdings in Ford v. Wainwright, and Stewart v. Martinez-Villareal.
Florida State Hospital (FSH) is a hospital and psychiatric hospital in Chattahoochee, Florida. Established in 1876, it was Florida's only state mental institution until 1947. It currently has a capacity of 1,042 patients. The hospital's current Administration Building is on the National Register of Historic Places.
In the United States criminal justice system, a competency evaluation is an assessment of the ability of a defendant to understand and rationally participate in a court process.
Dusky v. United States, 362 U.S. 402 (1960), was a landmark United States Supreme Court case in which the Court affirmed a defendant's right to have a competency evaluation before proceeding to trial. The Court outlined the basic standards for determining competency.
Perry v. Louisiana, 498 U.S. 38 (1990), was a United States Supreme Court case over the legality of forcibly medicating a death row inmate with a mental disorder, to render him competent to be executed.
Kennedy v. Louisiana, 554 U.S. 407 (2008), is a landmark decision by the Supreme Court of the United States which held that the Eighth Amendment's Cruel and Unusual Punishments Clause prohibits the imposition of the death penalty for a crime in which the victim did not die and the victim's death was not intended.
Stewart v. Martinez-Villareal, 523 U.S. 637 (1998), was a decision by the United States Supreme Court, which held that 28 U.S.C. § 2244(b) did not apply to a petition that raises only a competency to be executed claim and that respondent did not, therefore, need authorization to file his petition in the District Court.
The United States Constitution contains several provisions related to criminal sentencing.
Dawson v. Delaware, 503 U.S. 159 (1992), was a United States Supreme Court decision that ruled that a person's rights of association and due process, as granted under the First Amendment and Fourteenth Amendment of the United States Constitution, cannot be infringed upon if such an association has no bearing on the case at hand.
Madison v. Alabama, 586 U.S. ___ (2019), was a United States Supreme Court case regarding the Eighth Amendment to the United States Constitution, barring cruel and unusual punishment. The case deals with whether the Eighth Amendment prohibits executing a person for a crime they do not remember.
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).
