Ne Bis In Idem

Ne Bis In Idem is a legal principle that prevents an individual from being tried or punished more than once for the same offense, ensuring the finality of judgments. It embodies the concept of double jeopardy, creating a safeguard against the abuse of state power in prosecuting individuals.

The principle has its roots in Roman law, where it was recognized as a fundamental aspect of legal fairness. It has been subsequently adopted in various legal systems, particularly in common law jurisdictions.

In modern law, Ne Bis In Idem is applied to protect defendants from being subjected to multiple criminal prosecutions for the same act. It is recognized in many jurisdictions including the United States and under international human rights law, often outlined in constitutional or statutory provisions.

• A defendant acquitted of theft cannot be retried for that same theft if new evidence arises.
• A person sentenced for a misdemeanor cannot be prosecuted again for the same incident after serving their time.

• Blockburger v. United States, 284 U.S. 299 (1932)