>> the situation that has been escalating is about to explode. without warning, the driver makes a run for it, heading straight to his car. >> he reached around his shoulder blades and tried to pull him back from the vehicle. >> the officers have only seconds to react. >> that's when i saw a weapon coming across the back of the seat. >> gun, gun! >> gave a quick glance over to trooper harker as he was moving around and preparing to return fire. >> and that's when i put fire on him from the front of the vehicle. >> the passenger runs and deputy gates takes off after him. >> i started to chase after the passenger, but i didn't run full bore yet because i didn't know trooper harker's condition. >> freeze! >> the driver jumps in the truck and speeds off with harker still hanging on. >> after taking about three or four step after i got disengaged from the vehicle, i did fire a round to flatten a tire to impede his escape.