Agreed, they know that they are not expected to die if they can instead, shoot the perp attempting to kill them.
Now we're getting somewhere.
Who was doing the shooting? Who was the one trying to do the killing?
Until the cop could search the perp, especially after the perp assaulted him, he would assume the perp, as the Attorney General concurred, was coming back to inflict either death, or at a minimum, serious bodily injury (which can result in long term impairment and/or death).
Why would you allow that for the pay of a small city paycheck?