Manila, June 21 -- A drug suspect was killed while two others were arrested after anti-narcotics agents engaged the group in a shootout during a drug sting operation Monday afternoon. Director Rogelito Daculla of the Philippine Drug Enforcement Agency-Bangsamoro Autonomous Region in Muslim Mindanao (PDEA-BARMM) on Tuesday identified the slain suspect as Alex Usman. Usman reportedly operated a drug den in Barangay Rosary Heights 7 where his clients hold pot sessions frequently. Prior to the entrapment operation, Daculla said Usman was subjected to a month-long surveillance operation by police and PDEA operatives. Backed by elements of the Army's 99th Infantry Battalion, PDEA agents were about to arrest Usman after handing over PHP102,000 wor...