acquiter

Acquittal comes from Anglo-French and Old French acquiter (to discharge, to settle, to release from obligation), from Medieval Latin acquitare, composed of ad- (to, toward) and quitare (to release, to free from), from quittus (free, clear, released from obligation) — the same root that gives English 'quit,' 'quite,' 'quitclaim,' and 'receipt' (through Old French receit, via Medieval Latin recepta). The conceptual model underlying the word is one of debt and discharge: the accused person, by virtue of the charge against them, is in a kind of legal debt — they owe an account to justice — and the verdict either affirms that debt (conviction) or discharges it (acquittal). To acquit is to settle the account, to release the accused from the obligation the charge created. The word entered English legal vocabulary in the fourteenth century.

The acquittal is the terminal event of a criminal prosecution that ends without conviction. It may follow a jury verdict of not guilty, a judge's directed verdict in a bench trial, a judicial finding that the prosecution has presented insufficient evidence, or an appellate court's ruling that a conviction cannot stand. In all common law systems, a fundamental rule governs the acquittal: double jeopardy protection. Once a defendant has been acquitted of a charge, they cannot be tried again for the same offense by the same sovereign. This protection — enshrined in the Fifth Amendment of the U.S. Constitution and in the common law of most common law countries — means that an acquittal is final. The discharged debt cannot be reinstated; the released person cannot be recaptured for the same account.

The double jeopardy rule reflects a deep principle about the relationship between the state and the individual in criminal justice: that the state, with its vastly superior resources and investigative powers, should have one opportunity to prove guilt, and that repeated prosecutions would be a form of harassment — using the process as a punishment regardless of outcome. This principle is not absolute. American law distinguishes between federal and state prosecutions, allowing dual prosecution for the same act under 'dual sovereignty' doctrine, as in the 1992 Los Angeles police officers' case — acquitted in state court, later tried and convicted in federal court for civil rights violations. The line between one bite at the apple and two bites across sovereigns has been contested and is imperfectly drawn.

Famous acquittals have shaped legal history and public understanding of the criminal justice system in ways that convictions rarely do. The acquittal of the British soldiers tried after the Boston Massacre (1770) — defended by John Adams — established a principle about impartial legal representation in colonial America. The acquittal of William Penn (1670) established the independence of juries from judicial control in English law. The acquittal of O.J. Simpson (1995) prompted a national reckoning in the United States with the relationship between race, wealth, and criminal justice. Each acquittal, in discharging the legal debt of the accused, created a permanent account in the public record — a moment at which the system either performed according to its principles or exposed the gap between those principles and their application.