The Narcotics Suppression Squad, under the control of the Drug Enforcement Agency, is an elite unit responsible for conducting special operations on anti-drug missions. But Niimi, head of the DEA, had used the NSS as an attack force to gun down members of the Sunflower Society while allowing them to kill all of the unarmed employees under the direction of Gayle Yasuoka, and had been responsible for covertly assassinating Doctor Hisashi Imakurusu.