In jurisprudence, double jeopardy is a procedural defence that prevents an accused person from being tried again on the same charges following an acquittal or conviction and in rare cases prosecutorial and/or judge misconduct in the same jurisdiction. Double jeopardy is a common concept in criminal law – in civil law, a similar concept is that of res judicata. The double jeopardy protection in criminal prosecutions bars only an identical prosecution for the same offence; however, a different offence may be charged on identical evidence at a second trial. Res judicata protection is stronger – it precludes any causes of action or claims that arise from a previously litigated subject matter.
Jury nullification, also known in the United Kingdom as jury equity, or a perverse verdict, is when the jury in a criminal trial gives a verdict of not guilty even though they think a defendant has broken the law. The jury's reasons may include the belief that the law itself is unjust, that the prosecutor has misapplied the law in the defendant's case, that the punishment for breaking the law is too harsh, or general frustrations with the criminal justice system. Some juries have also refused to convict due to their own prejudices in favor of the defendant. Such verdicts are possible because a jury has an absolute right to return any verdict it chooses. Nullification is not an official part of criminal procedure but is the logical consequence of two rules governing the systems in which it exists:
- Jurors cannot be punished for passing an incorrect verdict.
- In many jurisdictions, a defendant who is acquitted cannot be tried a second time for the same offense.
In common law jurisdictions, an acquittal means that the prosecution has failed to prove that the accused is guilty beyond a reasonable doubt of the charge presented. It certifies that the accused is free from the charge of an offense, as far as criminal law is concerned. The finality of an acquittal is dependent on the jurisdiction. In some countries, such as the United States, an acquittal prohibits the retrial of the accused for the same offense, even if new evidence surfaces that further implicates the accused. The effect of an acquittal on criminal proceedings is the same whether it results from a jury verdict or results from the operation of some other rule that discharges the accused. In other countries, like Australia and the UK, the prosecuting authority may appeal an acquittal similar to how a defendant may appeal a conviction — but usually only if new and compelling evidence comes to light or the accused has interfered with or intimidated a juror or witness.
A hung jury, also called a deadlocked jury, is a judicial jury that cannot agree upon a verdict after extended deliberation and is unable to reach the required unanimity or supermajority. A hung jury may result in the case being tried again.
Batson v. Kentucky, 476 U.S. 79 (1986), was a landmark decision of the United States Supreme Court ruling that a prosecutor's use of a peremptory challenge in a criminal case—the dismissal of jurors without stating a valid cause for doing so—may not be used to exclude jurors based solely on their race. The Court ruled that this practice violated the Equal Protection Clause of the Fourteenth Amendment. The case gave rise to the term Batson challenge, an objection to a peremptory challenge based on the standard established by the Supreme Court's decision in this case. Subsequent jurisprudence has resulted in the extension of Batson to civil cases and cases where jurors are excluded on the basis of sex.
Racial discrimination in jury selection is specifically prohibited by law in many jurisdictions throughout the world. In the United States, it has been defined through a series of judicial decisions. However, juries composed solely of one racial group are legal in the United States and other countries. While the racial composition of juries is not dictated by law, racial discrimination in the selection of jurors is specifically prohibited. Depending on context, the phrases "all-white jury" or "all-black jury" can raise the expectation that deliberations may be unfair.
Apodaca v. Oregon, 406 U.S. 404 (1972), was a United States Supreme Court case in which the Court held that state juries may convict a defendant by a less-than-unanimous verdict in a felony criminal case. The four-justice plurality opinion of the court, written by Justice White, affirmed the judgment of the Oregon Court of Appeals and held that there was no constitutional right to a unanimous verdict. Although federal law requires federal juries to reach criminal verdicts unanimously, the Court held Oregon's practice did not violate the Sixth Amendment right to trial by jury and so allowed it to continue. In Johnson v. Louisiana, a case decided on the same day, the Court held that Louisiana's similar practice of allowing criminal convictions by a jury vote of 9–3 did not violate due process or equal protection under the Fourteenth Amendment.
In the United States, jury nullification occurs when a jury in a criminal case reaches a verdict contrary to the weight of evidence, sometimes because of a disagreement with the relevant law. It has its origins in colonial America under British law. The American jury draws its power of nullification from its right to render a general verdict in criminal trials, the inability of criminal courts to direct a verdict no matter how strong the evidence, the Fifth Amendment's Double Jeopardy Clause, which prohibits the appeal of an acquittal, and the fact that jurors cannot be punished for the verdict they return.
Hernandez v. New York, 500 U.S. 352 (1991), was a decision by the United States Supreme Court, which held that a prosecutor may dismiss jurors who are bilingual in Spanish and English from juries that will consider Spanish-language testimony.
Jury selection in the United States is the choosing of members of grand juries and petit juries for the purpose of conducting trial by jury in the United States.
Estelle v. Williams, 425 U.S. 501 (1976), is a Supreme Court case involving Harry Lee Williams' conviction of assault on his former landlord in Harris County, Texas. While awaiting trial Williams was unable to post bail. He was tried in his prison uniform, and later was found guilty. He sought a writ of habeas corpus saying being tried in a prison uniform violated his Constitutional rights in accordance with the 14th Amendment. The Court of Appeals ruled that the accused does not have to stand trial in identifiable prison clothes and Williams’ right to due process was violated. The Supreme Court reversed, reinstating the conviction, on June 21, 1976.
Glasser v. United States, 315 U.S. 60 (1942), was a landmark decision of the US Supreme Court on two issues of constitutional criminal procedure. Glasser was the first Supreme Court decision to hold that the Assistance of Counsel Clause of the Sixth Amendment required the reversal of a criminal defendant's conviction if his lawyer's representation of him was limited by a conflict of interest.
Taylor v. Illinois, 484 U.S. 400 (1988), is a United States Supreme Court decision in which the Court held that defense witnesses can be prevented from testifying under certain circumstances, even if that hurts the defense's case. Taylor was the first case to hold that there is no absolute bar to blocking the testimony of a surprise witness, even if that is an essential witness for the defendant, a limitation of the broad right to present a defense recognized in Washington v. Texas (1967).
Davis v. Ayala, 576 U.S. 257 (2015), was a case in which the Supreme Court of the United States upheld a death sentence of a Hispanic defendant despite the fact that all Blacks and Hispanics were rejected from the jury during the defendant's trial. The case involved a habeas corpus petition submitted by Hector Ayala, who was arrested and tried in the late 1980s for the alleged murder of three individuals during an attempted robbery of an automobile body shop in San Diego, California in April 1985. At trial, the prosecution used peremptory challenges to strike all Black and Hispanic jurors who were available for jury service. The trial court judge allowed the prosecution to explain the basis for the peremptory challenges outside the presence of Ayala's counsel, "so as not to disclose trial strategy". Ayala was ultimately sentenced to death, but he filed several appeals challenging the constitutionality of the trial court's decision to exclude his counsel from the hearings.
In December 2015, three Class II felony charges of aggravated indecent assault were filed against American media personality Bill Cosby in Montgomery County, Pennsylvania, based on allegations by Andrea Constand concerning incidents in January 2004. Cosby's first trial in June 2017 ended in a mistrial. Cosby was found guilty of three counts of aggravated indecent assault at retrial on April 26, 2018 and on September 25, 2018, he was sentenced to three to ten years in state prison and fined $25,000 plus the cost of the prosecution, $43,611.
Blueford v. Arkansas, 566 U.S. 599 (2012), was a decision of the Supreme Court of the United States that clarified the limits of the Double Jeopardy Clause. The Supreme Court held that the Double Jeopardy Clause does not bar retrial of counts that a jury had previously unanimously voted to acquit on, when a mistrial is declared after the jury deadlocked on a lesser included offense.
Burks v. United States, 437 U.S. 1 (1978), is a United States Supreme Court decision that clarified both the scope of the protection against double jeopardy provided by the Fifth Amendment to the United States Constitution and the limits of an appellate court's discretion to fashion a remedy under section 2106 of Title 28 to the United States Code. It established the constitutional rule that where an appellate court reverses a criminal conviction on the ground that the prosecution failed to present sufficient evidence to prove the defendant's guilt beyond a reasonable doubt, the Double Jeopardy Clause shields the defendant from a second prosecution for the same offense. Notwithstanding the power that appellate courts have under section 2106 to "remand the cause and direct the entry of such appropriate judgment, decree, or order, or require such further proceedings to be had as may be just under the circumstances," a court that reverses a conviction for insufficiency of the evidence may not allow the lower court a choice on remand between acquitting the defendant and ordering a new trial. The "only 'just' remedy" in this situation, the Court held, is to order an acquittal.
Flowers v. Mississippi, No. 17–9572, 588 U.S. 284 (2019), is a United States Supreme Court decision regarding the use of peremptory challenges to remove black jurors during a series of Mississippi criminal trials for Curtis Flowers, a black man convicted on murder charges. The Supreme Court held in Batson v. Kentucky that the use of peremptory challenges solely on the basis of race is unconstitutional. This case examined whether the Mississippi Supreme Court erred in how it applied Batson to this case. The Supreme Court ruled that Flowers' case fell under Batson and that the state inappropriately removed most of the potential black jurors during the trials.
Edwards v. Vannoy, 593 U.S. ___ (2021), was a United States Supreme Court case involving the Court's prior decision in Ramos v. Louisiana, 590 U.S. ___ (2020), which had ruled that jury verdicts in criminal trials must be unanimous under the Sixth Amendment to the U.S. Constitution. The Supreme Court ruled 6–3 that Ramos did not apply retroactively to earlier cases prior to their verdict in Ramos.
Johnson v. Louisiana, 406 U. S. 356 (1972), was a court case in the U.S. Supreme Court involving the Due Process Clause and Equal Protection Clause of the Fourteenth Amendment to the United States Constitution. The U.S. Supreme Court ruled that the Louisiana law that allowed less-than unanimous jury verdicts to convict persons charged with a felony, does not violate the Due Process clause. This case was argued on a similar basis as Apodaca v. Oregon.
