he shot and killed lavonia riggins saying he feared for his life and learned only later that riggins was unarmed. >> and the race to find the next killer street drug, it's high-tech and high risk and happening right here in florida. >> these drugs are being restructured to avoid the laws. >> >> this nondescript warehouse, somewhere in south florida. >> we are the southeast laboratory and cover the southeast portions of the united states and the caribbean. >> this is the fort knox of street drugs. >> we have marijuana, cocaine, cocaine -- these are what they call bulk submissions which are kilos of cocaine, and in that back corner is the candy -- >> we are inside the dea's largest lab in the united states and it deals with drugs so vast and dangerous that the locations are not even publicized. >> it's a new for the public but for law enforcement. >> simply bringing in drugs here means suiting up. >> this is a level-8 suit. >> this is very dangerous. >> before chemists can even analyze them. >> a lab coat, proper shoes and >> fentanyl can actually go through your skin and if inhale it