Wow, I hadn't read the full findings of the investigation. That tragedy could have been averted at so many different points.
I've been to plenty of bars where the staff puts up with the actions of the ultra-regulars, but the fact that the second bartender and owner opted not to call the cops after the gun is just ridiculous.
It sounds like the first bartender was trying to do the right thing, but she can't escape the fact that she kept serving him. I wonder if they were all scared he would snap and lose it right there if they did anything.
Either way, call the damn police when he leaves at least, and then maybe those people are still alive today. Horrible.