We all know you can fire that real quickly without too much thinking. We are so quick to read the article and arm chair quaterback in these threads.
Anyone who is firing "without too much thinking" shouldn't ever have a gun, LEO or civilian. As a person firing a lead projectile capable of serious injury or death must always be thinking about what they are doing. Bursts of rapid firing are fine, provided you know that your shot will be right on, or at least very, very close. If you can't account for a bullet if it is a miss, it should have never been fired. I have always thought that any person with a gun, civilian or LEO, should have to take defensive actions outside of firing if they can't be 100% sure they are going to hit their target and there are people in the backdrop, especially if they don't know the guilt of those people. This could have easily been two innocent people dead.