Good point! What if I did and accidently killed an innocent person, would I go to fail?
If you are going to CCW, the first thing to get through your head is that you may be forced to do something that will result in collateral damage. If someone is using an innocent person as a human shild while using an automatic weapon to mow down people, you have to accept that the innocent persons life may be lost to stop the person. If you hold off shooting at the person to save the one persons life, then he will kill 10, 20 or more people because you didnt want to risk one persons life. The best thing you can do is take aim as best a possible at the largest exposed area of the intended target and do the dead. If you did right, you will hit the mark. If you are lucky you may clip the innocent person, but do the intended damage to the perp. If you are unlucky, you will do life threatening damage to the innocent, but the primary thing is to stop the perp shooting.
He may be standing in front of a crowd. You know that if you miss, you will possibly hit, or kill someone else. But if you dont take the shot, then he will continue to intentionally kill those people you are not wanting to accidentally hit.
To not take aim, to the best of your abilities, and make the shot, because you are afraid of hurting someone is self defeating. When you are pushed to that point, that means that people are already being killed, so the longer you wait worrying about if you will hit an innocent is just causing more death than you could ever think about accidentally causing.
That is why people should practice with their weapon when ever possible. Slow aimed shots, fast shooting and everything in between. The best way of knowing if you can reliably make a shot is by experience.
So, keep this in mind
You may hit innocent people by accident, but he is doing it on purpose. Dont worry about accidentally injuring someone when it may prevent you from stopping someone from intentionally hurting someone.
If you did all you can do, to the best of your ability, then everything else be damned. I would rather go to jail for accidentally killing an innocent, than to walk free knowing 20 more people died because I wasnt capable of thinking past the repercussions I may face afterward.