Five staccato gunshots rang out Thursday morning inside Mayport Coastal SciencesMiddle School, followed by an automated alarm broadcasting “Lockdown!” across the campus as red strobe lights flashed.
But it was only a drill.
Within minutes, Duval County School Police officers began arriving as part of a multi-agency training exercise that included Jacksonville Sheriff’s Office and Fire and Rescue Department personnel on the Mayport Road campus to deal with a fictional shooter inside, and his “victims.”…