What is the meaning of "Autrefois convict" in legal jargon?

The term "Autrefois convict" is derived from French, translating to "previously convicted." In legal jargon, it refers to a plea where a defendant asserts that they have already been convicted of the same offense in a past trial, and therefore cannot be tried again for that same crime. This concept is rooted in the principle of double jeopardy, which prohibits an individual from being tried twice for the same crime.

This plea serves to protect the rights of individuals against repetitive legal action for a singular offense, ensuring that the legal system does not subject individuals to continuous prosecution for the same actions. As a result, the understanding of "Autrefois convict" is crucial in legal discussions about an individual's rights and the boundaries of prosecutorial power.