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The Principle of Double Jeopardy in the United States

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The principle of double jeopardy prevents multiple prosecutions for the same crime in U.S. law. It attaches under certain conditions and has exceptions, such as the separate sovereigns doctrine. Landmark cases like Fong Foo v. United States and Gamble v. United States have shaped its interpretation, highlighting its complexity and significance in protecting citizens' rights.

The Principle of Double Jeopardy in U.S. Law

The principle of double jeopardy is enshrined in the Fifth Amendment of the United States Constitution, which safeguards individuals from being prosecuted more than once for the same offense. This legal doctrine ensures that once a person has been acquitted or convicted in a court of law, or has served the sentence for their crime, they cannot be subjected to another prosecution for the same incident. The clause explicitly states, "No person shall ... be subject for the same offense to be twice put in jeopardy of life or limb," thereby preventing the government from retrying an individual following an acquittal, even if new evidence comes to light, and from imposing additional punishments after the original sentence has been served.
Empty courtroom with judge's bench, two lawyers' tables with papers, jury box with twelve chairs, witness stand, and large arched windows.

The Parameters of Double Jeopardy

Double jeopardy attaches under specific conditions: in a jury trial, it attaches when the jury is empaneled and sworn; in a bench trial, it attaches when the first witness is sworn in. The attachment of jeopardy upon entering a guilty plea varies by jurisdiction. There are circumstances under which double jeopardy does not prohibit a retrial, such as when a mistrial is declared because the jury cannot reach a verdict, or other procedural issues arise that prevent the trial's completion. However, if a mistrial is due to prosecutorial misconduct or the prosecution's lack of preparation for foreseeable problems, a retrial may be precluded to prevent abuse of the legal process.

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Constitutional Amendment protecting double jeopardy

Fifth Amendment of the U.S. Constitution

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Double jeopardy protection after acquittal

No retrial allowed following an acquittal, even with new evidence

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Double jeopardy and additional punishments

Prohibits imposing extra punishments post original sentence

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