What does double jeopardy, protected under the 5th Amendment, ensure?

Double jeopardy, as outlined in the 5th Amendment, specifically ensures that a person cannot be tried twice for the same offense after they have been acquitted or convicted. This principle is fundamental to the legal system as it protects individuals from the emotional, financial, and social toll of facing repeated trials for the same conduct. By prohibiting multiple prosecutions for the same crime, double jeopardy serves to safeguard individuals from the power of the state and ensures the finality of legal judgments.

The other options relate to different legal protections: the prohibition against arrest without a warrant addresses the right to privacy and protection from unlawful detention, the right to legal counsel ensures individuals have the opportunity for representation in legal matters, and the right against indefinite detention without charges protects due process. Each of these principles serves to uphold justice and individual rights in their own contexts, separate from the specific protection offered by the double jeopardy clause.