If you look up ??????? ???? ?????
??????? ?? you will see that that was not long term either.
If I remember correctly Beis Din used extra-judicial powers such as ??????? ???? ????? for economic crimes such as price gouging. Another possibility he was dealt with by the ??? if there was one. a ??? operated under a different set of ????? .
not only in cases of national security (from memory, correct me)