Read a few years back of a new drill, like the two to the chest one to the head thing, but this had you fire to the groin area. Anyone have info or thoughts on this. (Sorry for the lack of question mark, the wife has the keyboard set in espanol and cant find the darn thing)
I'll preface my response with a bit of background on how we were trained in my department. We weren't ever really trained with the "two to the chest one to the head" drill around here. Our training was more oriented around the idea that you need to shoot towards the goal of solving the problem.
In talking with some of our older guys, the training we had a few decades ago consisted of drawing, firing two shots, then reholstering the weapon (some of you can probably already see where this is going). Anyway, in time the department discovered that officers would sometimes do this in actual shootings, and would holster their weapon while the threat was still present! It sounds ridiculous, but these things can become a matter of habit if they are done often enough in the same manner.
As such, our training has evolved to the point that we don't really have any specific order/number of shots that we are taught to fire in the course of an attack. During training/qualification the range officer will simply state instructions before each string is fired (ie: "When the bad guy faces, draw your weapon, fire 4 shots to the body and two to the head. Or, "When the threat appears fire two shots to the body, conduct a tactical reload, and fire two more shots to the body). The philosophy seems to be that if you vary the shot count and such, the officer will be more likely to engage the target without falling into a "routine" of stopping before the threat is gone.
A center of mass shot (or two, or three) is a good place to start, simply because it is the easiest target. The head is a harder target to hit, but also contains the body's "CPU". The pelvic girdle probably won't completely incapacitate the attacker immediately, but can certainly "remove their wheels".
We were certainly taught to include the pelvic girdle as a viable target, and our old qualification targets actually had a scoring zone for the pelvic girdle area. Again, we weren't really trained to fire a shot to that area at a specific time, but rather to remember that we need to find something that works (ie: if the head and body haven't dropped the bad guy, try the pelvic girdle). I might not be doing the best job of articulating this training philosophy, but I'll summarize it as: "When in doubt, DO SOMETHING!"