A deficiency in police training.

Reportedly, in police training, the targets are all clearly "good guys" and "bad guys", and the bad guys are the ones with firearms.

The inevitable result: an armed homeowner who subdues a home invader is shot multiple times by Phoenix police.

It's high time our police are given training (or re-training) appropriate for a state in which concealed carry and open carry are both legal and in which citizens can thus be expected to defend themselves and others with arms when necessary. "Shoot the man with the gun" is sloppy, unprofessional, and downright dangerous to life and liberty.