[El Gato]

Yes it is possible , if the perp was a trained shooter. He also likely had a scoped rifle that was properly sighted in from the sound of things. But I am guessing at this point like everyone else.

Inside a building? More likely he had iron sights or some sort of red dot type. Head shots at close range with a rifle is no big deal. The two motor officers were also shot at pretty close range. And those were also head & neck hits according to the guy who gave one of the officers CPR. (Not everyone, or even the majority, even in the most scummy neighborhoods, is a Bad Guy, of course it could have been the pharmacist from the nearby pharmacy, and not a local resident).

[Arizona Carolyn]

The motorcycle officers shooting sounds a lot like the shooting in Long Beach a few years ago, same sort of situation.