This. I'm surprised no one else has piggy-backed on this argument. While I am not any kind of law enforcement, I have had extensive firearm training and self-defense training. Quite simply, handguns are pretty inaccurate weapons. With a well-trained person, they can get a pretty tight group of shots at about 25 feet (~7.5 meters for those outside the US). Anything beyond that and the accuracy dramatically decreases. Since the handgun has a short barrel, bullets have a slower velocity, thus making them more susceptible to outside factors such as wind and gravity. I think you would be shocked to know how much a .45 bullet will drop in just 50 feet from being shot from a handgun.senordesol said:When you deploy a firearm, you are using deadly force. That bullet has the potential to kill, and if it misses the suspect; you could be killing an innocent bystander by mistake (bullets don't stop when they miss). Aiming for the center-of-mass ensures that you have the best chance of hitting the target you were intending to hit. Aiming for shoulders, legs, or hands only increases the potential of a wayward (lethal) projectile.
Deadly force should only be applied to a deadly threat, when you deploy a firearm; it should only be because the subject in the situation displayed what could be reasonably construed as an immediate lethal threat (e.g.: pointing a gun at police officers). In such cases, it may be unfortunate that a man (or woman) has to die -but it's unreasonable to expect the officers to take the risk.
Entertainment has propagated a huge myth that someone can blind fire (i.e. not look down the sights) a pistol with one hand and still take out targets with extreme precision. Quite simply, it doesn't happen. You pretty much need to have a firm stance and double handed grip on the gun to hit with any sort of precision. Plus, any slight error in the pull of the trigger could result in the shot hitting way off the mark.
So quite simply, officers are trained to aim for the largest target, which happens to be the chest. Likewise, an officer is trained to be fully aware of all surroundings both around and behind the target. Because chances are high that the bullet will miss the mark and could pose a risk to anyone or anything nearby. By aiming for a smaller target such as a shoulder, leg, arm, etc, you only increase that risk dramatically. It is not unheard of to hear stories of a stray bullet penetrating several walls and striking an innocent inhabitant.
TL