Washington( CNN) While the FBI conducts its criminal investigation of last week’s congressional baseball practice shooting, on Monday Alexandria’s police chief described to reporters the quick and courageous actions of law enforcement officers and first responders who rushed to the scene at Simpson Park.

Alexandria Police Department Chief Michael Brown outlined a timeline of what happened last Wednesday morning, highlighting the valour of the three APD officers who were first to respond to the call.

“You can’t teach the kind of courage and instincts that I considered from( those) three officers, ” Brown said.