The High-Ranking Public Officials Crime Investigation Agency (hereinafter referred to as the NISA), the National Police Agency's National Investigation Headquarters (hereinafter referred to as the NISA), and the Ministry of National Defense's Investigation Headquarters (hereinafter referred to as the NISA) have established a Joint Investigation Headquarters (hereinafter referred to as the NISA) for the investigation into the "December 3 Emergency Martial Law Situation" (hereinafter referred to as the "12.3 Emergency Martial Law Situation").