CUTLER BAY, Fla. – A gunman opened fire on four Miami-Dade County police officers during a traffic stop Thursday, killing one and injuring the other three before fleeing and triggering a manhunt across South Florida. The officers were conducting burglary surveillance when they stopped the man because he was driving a car erratically, police spokeswoman Linda O’Brien said. The man opened fire with a high-powered weapon without warning and fled. It was not immediately clear whether the officers returned fire. TV footage showed several officers briefly surrounding a house, guns drawn, before moving on. Others swept through a grassy area on foot and picked through a garbage truck. Several schools were locked down during the search in Cutler Bay, in suburban Miami. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! Authorities were looking for Shawn Sherwin Labeet, 25, who may have been wearing a bulletproof vest.