Constantine Demetriades, 21, was busted Wednesday after security at Rollins College in Winter Park flagged his massive online order of 1,500 rounds of ammo, leading cops to his shared dorm, where they found an AR-15 stashed under his bed in an unsecured black case. Florida college student, 21, busted after cops found AR-15 under dorm bed when he ordered 1,500 rounds of ammo to campus