Obvious conclusion. Ban SWAT type clothing. Makes bad guys feel badder. So, I read somewhere he had on body armor. Head shot? That’s what I was taught anyway. Double tap to the noggin if you’re good/accurate enough. Only one if your caliber of choice is big enough.
A round from a.45 on body armor is going to hit the person wearing the body armor with the force of a lead pipe or a tree trunk. If you're a decent shot armed with a .45, the guy wearing body armor will be on his ass, head shot or not.
So, I read somewhere he had on body armor.
My guess is that he had one of these $108 black "urban assault tactical vests," worn by some shooters (and urban assault fisherman ;-) Same kind the Batman theater killer ordered from tacticalgear.com.
Guaranteed to stop nothing, including the breeze that blows through the enormous gap in the middle of the chest.