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 except when the defendant is a servicemember as the courts have ruled that the military courts are a separate sovereign, therefore servicemembers can be held in two separate trials for exactly the same charges; 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.
Extraterritorial jurisdiction (ETJ) is the legal ability of a government to exercise authority beyond its normal boundaries.
An ex post facto law is a law that retroactively changes the legal consequences or status of actions that were committed, or relationships that existed, before the enactment of the law. In criminal law, it may criminalize actions that were legal when committed; it may aggravate a crime by bringing it into a more severe category than it was in when it was committed; it may change the punishment prescribed for a crime, as by adding new penalties or extending sentences; it may extend the statute of limitations; or it may alter the rules of evidence in order to make conviction for a crime likelier than it would have been when the deed was committed.
In common law jurisdictions, an acquittal means that the criminal 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.
Criminal jurisdiction is a term used in constitutional law and public law to describe the power of courts to hear a case brought by a state accusing a defendant of the commission of a crime. It is relevant in three distinct situations:
- to regulate the relationship between states, or between one state and another;
- where the nation is a federation, to regulate the relationship between the federal courts and the domestic courts of those states comprising the federation; and
- where a state only has, to a greater or lesser extent, a single and unified system of law, it is the law of criminal procedure to regulate what cases each classification of court within the judicial system shall adjudicate upon. People must be tried in the same state the crime is committed.
Hostis humani generis is a legal term of art that originates in admiralty law. Before the adoption of public international law, pirates and slavers were generally held to be beyond legal protection and so could be dealt with by any nation, even one that had not been directly attacked.
Heath v. Alabama, 474 U.S. 82 (1985), is a case in which the United States Supreme Court ruled that, because of the doctrine of "dual sovereignty", the double jeopardy clause of the Fifth Amendment to the Constitution does not prohibit one state from prosecuting and punishing somebody for an act of which they had already been convicted of and sentenced for in another state.
United States v. Felix, 503 U.S. 378 (1992), was a decision by the United States Supreme Court, which held that "a[n]…offense and a conspiracy to commit that offense are not the same offense for double jeopardy purposes." The Supreme Court rejected the Tenth Circuit's reversal of Felix's conviction, finding that the Court of Appeals read the holding in Grady v. Corbin (1990) too broadly.
The Double Jeopardy Clause of the Fifth Amendment to the United States Constitution provides: "[N]or shall any person be subject for the same offence to be twice put in jeopardy of life or limb..." The four essential protections included are prohibitions against, for the same offense:
Waller v. Florida, 397 U.S. 387 (1970), was a decision by the United States Supreme Court, which held that the Double Jeopardy Clause protects defendants from successive prosecutions by states and municipalities for offenses based on the same criminal conduct.
United States v. Lara, 541 U.S. 193 (2004), was a United States Supreme Court landmark case which held that both the United States and a Native American (Indian) tribe could prosecute an Indian for the same acts that constituted crimes in both jurisdictions. The Court held that the United States and the tribe were separate sovereigns; therefore, separate tribal and federal prosecutions did not violate the Double Jeopardy Clause.
The Marshall Court (1801–1835) heard forty-one criminal law cases, slightly more than one per year. Among such cases are United States v. Simms (1803), United States v. More (1805), Ex parte Bollman (1807), United States v. Hudson (1812), Cohens v. Virginia (1821), United States v. Perez (1824), Worcester v. Georgia (1832), and United States v. Wilson (1833).
The Taney Court heard thirty criminal law cases, approximately one per year. Notable cases include Prigg v. Pennsylvania (1842), United States v. Rogers (1846), Ableman v. Booth (1858), Ex parte Vallandigham (1861), and United States v. Jackalow (1862).
The Crimes Act of 1790, formally titled An Act for the Punishment of Certain Crimes Against the United States, defined some of the first federal crimes in the United States and expanded on the criminal procedure provisions of the Judiciary Act of 1789. The Crimes Act was a "comprehensive statute defining an impressive variety of federal crimes".
United States v. Jackalow, 66 U.S. 484 (1862), is a U.S. Supreme Court case interpreting the Venue and Vicinage clauses of the United States Constitution. It was an "unusual criminal case" and one of the few constitutional criminal cases from the Taney Court. Jackalow, a mariner from the Ryukyu Kingdom, was suspected of the robbery and murder of the captain of the sloop Spray, Jonathan Leete, and Jonathan's brother Elijah, while the ship was at sea. He was convicted of robbery in the Long Island Sound, but as there was disagreement over the question of jurisdiction between the two judges who heard the post-trial motion, the case was referred to the Supreme Court by certificate of division.
Abbate v. United States, 359 U.S. 187 (1959), is a decision of the U.S. Supreme Court. The decision held that the double jeopardy Clause of the Fifth Amendment to the U.S. Constitution does not prohibit the prosecution of a conspiracy in federal court under federal law when that same conspiracy has already resulted in a conviction in state court under state law.
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.
Gamble v. United States, No. 17-646, 587 U.S. 678 (2019), was a United States Supreme Court case about the separate sovereignty exception to the Double Jeopardy Clause of the Fifth Amendment to the United States Constitution, which allows both federal and state prosecution of the same crime as the governments are "separate sovereigns". Terance Martez Gamble was prosecuted under both state and then federal laws for possessing a gun while being a felon. His argument that doing so was double jeopardy was found unpersuasive due to the exception. In June 2019, the Supreme Court affirmed the lower court decision 7–2, with the majority opinion stating that there was not sufficient cause for overturning the dual sovereignty doctrine.
International piracy law is international law that is meant to protect against piracy. Throughout history and legal precedents, pirates have been defined as hostis humani generis, Latin for "the enemy of all mankind". The United Nations has codified much of the law in the United Nations Convention on the Law of the Sea (UNCLOS), which defines different types of piracy and ways to combat it.
