From the shooting classes I've taken I've been told that criminals are usually bad shots. There are exceptions to that but from what I've been told criminals that use guns are not that different in most people that own or use guns in that they get a gun and shoot maybe a box of ammo and think that they can then solve any problem, or in the criminal's case, cause any problem with a gun. That being said, somebody with good training and a good gun that they're skilled with should be able to take on most criminals who are usually going to be lousy shots. Like I said, there are exceptions but most criminals I've been told fall into the category of being bad shots.