Student Jon Meis takes heroic actions by deploying mace and disarming a gunman who shot three, then he returns as the shooter pulls a knife and wrestles that away from him too.The King County Prosecutor’s Office on Tuesday released 18 DVDs of surveillance video captured on June 5, 2014, and prior days. A three-minute excerpt shows the take-down of Aaron Ybarra, the 27-year-old Mountlake Terrace man who shot and killed one student and injured two others at the Seattle school’s campus.