In the United States, the Miranda warning is a type of notification customarily given by police to criminal suspects in police custody advising them of their right to silence and, in effect, protection from self-incrimination; that is, their right to refuse to answer questions or provide information to law enforcement or other officials. Named for the U.S. Supreme Court's 1966 decision Miranda v. Arizona, these rights are often referred to as Miranda rights. The purpose of such notification is to preserve the admissibility of their statements made during custodial interrogation in later criminal proceedings. The idea came from law professor Yale Kamisar, who subsequently was dubbed "the father of Miranda."
In criminal law, police perjury, sometimes euphemistically called "testilying", is the act of a police officer knowingly giving false testimony. It is typically used in a criminal trial to "make the case" against defendants believed by the police to be guilty when irregularities during the suspects' arrest or search threaten to result in their acquittal. It also can be extended to encompass substantive misstatements of fact to convict those whom the police believe to be guilty, procedural misstatements to "justify" a search and seizure, or even the inclusion of statements to frame an innocent citizen. More generically, it has been said to be "[l]ying under oath, especially by a police officer, to help get a conviction."
An arrest is the act of apprehending and taking a person into custody, usually because the person has been suspected of or observed committing a crime. After being taken into custody, the person can be questioned further and/or charged. An arrest is a procedure in a criminal justice system, sometimes it is also done after a court warrant for the arrest.
In jurisprudence, prosecutorial misconduct or prosecutorial overreach is "an illegal act or failing to act, on the part of a prosecutor, especially an attempt to sway the jury to wrongly convict a defendant or to impose a harsher than appropriate punishment." It is similar to selective prosecution. Prosecutors are bound by a set of rules which outline fair and dispassionate conduct.
A prosecutor is a legal representative of the prosecution in states with either the adversarial system, which is adopted in common law, or inquisitorial system, which is adopted in civil law. The prosecution is the legal party responsible for presenting the case in a criminal trial against the defendant, an individual accused of breaking the law. Typically, the prosecutor represents the state or the government in the case brought against the accused person.
Discovery, in the law of common law jurisdictions, is a phase of pretrial procedure in a lawsuit in which each party, through the law of civil procedure, can obtain evidence from other parties by means of methods of discovery such as interrogatories, requests for production of documents, requests for admissions and depositions. Discovery can be obtained from nonparties using subpoenas. When a discovery request is objected to, the requesting party may seek the assistance of the court by filing a motion to compel discovery. Conversely, a party or nonparty resisting discovery can seek the assistance of the court by filing a motion for a protective order.
Exculpatory evidence is evidence favorable to the defendant in a criminal trial that exonerates or tends to exonerate the defendant of guilt. It is the opposite of inculpatory evidence, which tends to present guilt.
Brady v. Maryland, 373 U.S. 83 (1963), was a landmark U.S. Supreme Court decision holding that under the Due Process Clause of the Constitution of the United States, the prosecution must turn over to a criminal defendant any significant evidence in its possession that suggests the defendant is not guilty.
Actual innocence is a special standard of review in legal cases to prove that a charged defendant did not commit the crimes that they were accused of, which is often applied by appellate courts to prevent a miscarriage of justice.
Shareef Cousin is an African-American man from New Orleans who was convicted of the first-degree murder of Michael Gerardi in 1996 and sentenced to death as a juvenile in Louisiana. At age 17, he became the youngest condemned convict to be put on death row in Louisiana, and one of the youngest in the United States.
In the United States, the Jencks Act requires the prosecutor to produce a verbatim statement or report made by a government witness or prospective government witness, but only after the witness has testified.
A Pitchess motion is a request made by the defense in a California criminal case, such as a DUI case or a resisting arrest case, to access a law enforcement officer's personnel information when the defendant alleges in an affidavit that the officer used excessive force or lied about the events surrounding the defendant's arrest. The information provided will include prior incidents of use of force, allegations of excessive force, citizen complaints, and information gathered during the officer's pre-employment background investigation. The motion's name comes from the case Pitchess v. Superior Court.
Kyles v. Whitley, 514 U.S. 419 (1995), is a United States Supreme Court case that held that a prosecutor has an affirmative duty to disclose evidence favorable to a defendant pursuant to Brady v. Maryland and United States v. Bagley.
In United States criminal procedure, the Federal government and certain states have reciprocal discovery laws that compel defendants to disclose some information to prosecutors before trial. Within the federal court system, this material is referred to as reverse Jencks Act material, after the United States Supreme Court case which established the principle, Jencks v. United States.
Giglio v. United States, 405 U.S. 150 (1972), is a United States Supreme Court case in which the Court held that the prosecution's failure to inform the jury that a witness had been promised not to be prosecuted in exchange for his testimony was a failure to fulfill the duty to present all material evidence to the jury, and constituted a violation of due process, requiring a new trial. This is the case even if the failure to disclose was a matter of negligence and not intent. The case extended the Court's holding in Brady v. Maryland, requiring such agreements to be disclosed to defense counsel. As a result of this case, the term Giglio material is sometimes used to refer to any information pertaining to deals that witnesses in a criminal case may have entered into with the government.
Department of Justice v. Landano, 508 U.S. 165 (1993), was a case in which the Supreme Court of the United States held that the government is not entitled to a presumption that a source is confidential within the meaning of Exemption 7(D) of the Freedom of Information Act whenever the source provides information to the Federal Bureau of Investigation in the course of a criminal investigation.
Napue v. Illinois, 360 U.S. 264 (1959), was a United States Supreme Court case in which the Court held that the knowing use of false testimony by a prosecutor in a criminal case violates the Due Process Clause of the Fourteenth Amendment to the United States Constitution, even if the testimony affects only the credibility of the witness and does not directly relate to the innocence or guilt of the defendant.
United States v. Bagley, 473 U.S. 667 (1985), was a Supreme Court of the United States case that established the standard for materiality under Brady v. Maryland.
United States v. Ruiz, 536 U.S. 622 (2002), was a decision by the United States Supreme Court in which the Court held that Brady v. Maryland did not require prosecutors to disclose impeachment evidence during plea bargaining.
United States v. Agurs, 427 U.S. 97 (1976), was a case heard by the Supreme Court of the United States in 1976. The case clarified the obligation of a prosecutor to provide exculpatory evidence to a criminal defendant.
