Double jeopardy is a legal principle that protects individuals from being tried twice for the same crime after a legitimate acquittal or conviction. This concept is integral to ensuring that a person is not subjected to multiple prosecutions for the same offense, which aligns with the fundamental rights established in legal protections. The principle also intersects with various defenses and amendments that safeguard an individual's rights during criminal proceedings, emphasizing the importance of fairness in adjudication processes.