An Alford plea, in United States law, is a guilty plea in criminal court, whereby a defendant in a criminal case does not admit to the criminal act and asserts innocence. In entering an Alford plea, the defendant admits that the evidence presented by the prosecution would be likely to persuade a judge or jury to find the defendant guilty beyond a reasonable doubt.
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 his or her actions due to an episodic or persistent 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 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 themselves or to others.
Burden of proof is a legal duty that encompasses two connected but separate ideas that for establishing the truth of facts in a trial before tribunals in the United States: the "burden of production" and the "burden of persuasion" In a legal dispute, one party is initially presumed to be correct, while the other side bears the burden of producing evidence persuasive enough to establish the truth of facts needed to satisfy all the required legal elements of legal dispute. There are varying types of burden of persuasion commonly referred to as standards of proof, and depending on the type of case, the standard of proof will be higher or lower. Burdens of persuasion and production may be of different standards for each party, in different phases of litigation. The burden of production is a minimal burden to produce at least enough evidence for the trier of fact to consider a disputed claim. After litigants have met the burden of production, they have the burden of persuasion: that enough evidence has been presented to persuade the trier of fact that their side is correct. There are different standards of persuasiveness ranging from a preponderance of the evidence, where there is just enough evidence to tip the balance, to proof beyond a reasonable doubt, as in United States criminal courts.
Entrapment is a practice whereby a law enforcement agent or agent of the state induces a person to commit a "crime" that the person would have otherwise been unlikely or unwilling to commit. It "is the conception and planning of an offense by an officer or agent, and the procurement of its commission by one who would not have perpetrated it except for the trickery, persuasion or fraud of the officer or state agent."
An affirmative defense to a civil lawsuit or criminal charge is a fact or set of facts other than those alleged by the plaintiff or prosecutor which, if proven by the defendant, defeats or mitigates the legal consequences of the defendant's otherwise unlawful conduct. In civil lawsuits, affirmative defenses include the statute of limitations, the statute of frauds, waiver, and other affirmative defenses such as, in the United States, those listed in Rule 8 (c) of the Federal Rules of Civil Procedure. In criminal prosecutions, examples of affirmative defenses are self defense, insanity, and the statute of limitations.
Brady disclosure consists of exculpatory or impeaching information and evidence that is material to the guilt or innocence or to the punishment of a defendant. The term comes from the 1963 U.S. Supreme Court case Brady v. Maryland, in which the Supreme Court ruled that suppression by the prosecution of evidence favorable to a defendant who has requested it violates due process.
Beyond a reasonable doubt is a legal standard of proof required to validate a criminal conviction in most adversarial legal systems. It is a higher standard of proof than the balance of probabilities and is usually therefore reserved for criminal matters where what is at stake is considered more serious and therefore deserving of a higher threshold.
Hartman v. Moore, 547 U.S. 250 (2006), is a decision by the Supreme Court of the United States involving the pleading standard for retaliatory prosecution claims against government officials. Following a successful lobbying attempt by the CEO of a manufacturing company against competing devices that the United States Postal Service supported, the CEO found himself the target of an investigation by U.S. postal inspectors and a criminal prosecution, which was dismissed for lack of evidence. The CEO then filed suit against the inspectors and other government officials for seeking to prosecute him in retaliation for exercising his First Amendment rights to criticize postal policy. The Court ruled, 5-2, that in order to prove that the prosecution was caused by a retaliatory motive, the plaintiff bringing such a claim must allege and prove that the criminal charges were brought without probable cause.
In re Winship, 397 U.S. 358 (1970), was a United States Supreme Court decision that held that "the Due Process clause protects the accused against conviction except upon proof beyond a reasonable doubt of every fact necessary to constitute the crime charged." It established this burden in all cases in all states. The decision did not specify which facts constitute the charged crime.
Dixon v. United States, 548 U.S. 1 (2006), was a United States Supreme Court case concerning the level of proof required to establish the affirmative defense of duress in a federal criminal case.
The Fifth Amendment to the United States Constitution addresses criminal procedure and other aspects of the Constitution. It was ratified in 1791 as part of the Bill of Rights. The Fifth Amendment applies to every level of the government, including the federal, state, and local levels, as well as any corporation, private enterprise, group, or individual, or any foreign government in regard to a US citizen or resident of the US. The Supreme Court furthered the protections of this amendment through the Due Process Clause of the Fourteenth Amendment.
Foucha v. Louisiana, 504 U.S. 71 (1992), was a U.S. Supreme Court case in which the court addressed the criteria for the continued commitment of an individual who had been found not guilty by reason of insanity. The individual remained involuntarily confined on the justification that he was potentially dangerous even though he no longer suffered from the mental illness that served as a basis for his original commitment.
Patterson v. New York, 432 U.S. 197 (1977), is a legal case heard by the United States Supreme Court regarding the constitutionality under the Fourteenth Amendment's Due Process Clause of burdening a defendant with proving the affirmative defense of extreme emotional disturbance as defined by New York law.
United States criminal procedure derives from several sources of law: the baseline protections of the United States Constitution, federal and state statutes; federal and state rules of criminal procedure ; and state and federal case law. Criminal procedures are distinct from civil procedures in the US.
Melendez-Diaz v. Massachusetts, 557 U.S. 305 (2009), is a United States Supreme Court case in which the Court held that it was a violation of the Sixth Amendment right of confrontation for a prosecutor to submit a chemical drug test report without the testimony of the person who performed the test. While the court ruled that the then-common practice of submitting these reports without testimony was unconstitutional, it also held that so called "notice-and-demand" statutes are constitutional. A state would not violate the Constitution through a "notice-and-demand" statute by both putting the defendant on notice that the prosecution would submit a chemical drug test report without the testimony of the scientist and also giving the defendant sufficient time to raise an objection.
Leland v. Oregon, 343 U.S. 790 (1952), was a United States Supreme Court case in which the Court upheld the constitutionality of placing the burden of persuasion on the defendant when they argue an insanity defense in a criminal trial. This differed from previous federal common law established in Davis v. United States (1895), in which the court held that if the defense raised an insanity defense, the prosecution must prove sanity beyond a reasonable doubt, but Davis was not a United States constitutional ruling, so only limited federal cases, but not state cases. Oregon had a very high burden on defense, that insanity be proved beyond a reasonable doubt. At that time, twenty other states also placed the burden of persuasion on the defense for an insanity defense.
The United States Constitution contains several provisions regarding the law of criminal procedure.
Justification and excuse are different defenses in a criminal case. Both defenses admit that the defendant committed an act proscribed by law. The proscribed act has justification if the act had positive effects that outweigh its negative effects, or is not wrong or blameworthy. The proscribed act is excused if the defendant's violation was not entirely voluntary, such as if they acted under duress or under a false belief. Martin v. Ohio (1986) established that states may make justification an affirmative defense, placing the burden of proof on defendant. Patterson v. New York (1977) established that states may make excuses, such as involving mental state, an affirmative defense, rather than part of the mens rea element the prosecution must prove beyond a reasonable doubt.
Mullaney v. Wilbur, 421 U.S. 684 (1975), is a criminal case in which a unanimous court struck down a state statute requiring a defendant to prove the defense of provocation to downgrade a murder conviction to manslaughter. Previous common law, such as in Commonwealth v. York (1845), allowed such burden on the defense.
