Maybe their PD need to address their response times. I can imagine they had warning and probably thought it was just "those pesky channers" pranking them or something. I can only imagine some people would have more than likely told them what was happening since the dude did post the facebook link. I mean when the shooter can go back just to double tap, get in his car, do some driveby shootings, and hit up another mosque, then that shows their department has failed in response timing.
I get it this has never happened to them. This is not something they are use to, but this seems like they are lashing out for their own incompetency or at least lack of experience in this type of situation.
Sorry if that came off a bit angry. Been a lurker for awhile, but decided to finally join. Probably should not have made this my first post.