ne bis in idem

From Latin, literally, "not twice in the same," a legal doctrine which holds that legal action cannot be taken twice against someone for the same offense, a concept more commonly known as "double jeopardy." Yes, I know there's new evidence linking the chief financial officer to the embezzlement scheme, but he's already been tried for that. If we bring this new evidence against him now, the judge will toss it out on the ground of the "ne bis in idem" principle.