Which Amendment guarantees protection against double jeopardy?

The Fifth Amendment guarantees protection against double jeopardy, which is a fundamental principle in the U.S. legal system. This protection ensures that an individual cannot be prosecuted more than once for the same offense after either an acquittal or a conviction. The aim is to uphold the integrity of the judicial process and to prevent the government from subjecting a person to repeated trials for the same crime, which could lead to legal harassment and the potential for miscarriages of justice.

In the context of the other amendments listed, the Third Amendment addresses the quartering of soldiers in private homes, the Seventh Amendment pertains to the right to a jury trial in civil cases, and the Eighth Amendment focuses on prohibiting excessive bail, fines, and cruel and unusual punishment. None of these amendments deal with the principle of double jeopardy, underscoring the specificity and importance of the Fifth Amendment's protections in the realm of criminal law.