In a nutshell, the initial term starts when the nefarious act is committed. Assuming someone got caught, the initial term ends. A new one starts with each investigative or prosecution act. The replacement term has the same length as the original.

For criminal acts, the total term is usually limited to the double of the original. In civil cases, the timer can be reset indefinitely. That is usually used against small fry by both government and private persuers, but given a defendant with deep enough pockets, they can stretch the case until the court finally punts.

A sales tax fraud case where the State was duped for 10M euro was just tossed that way. The main suspect was the grandson of Brussels' largest real estate developer. Par for the course there...