[Verginius Rufus]

I take it that the owner of the bar had seen him in the bar multiple times.

Maybe the best outcome at this point is if they find him dead by a self-inflicted gunshot, before he kills anyone else.

[Texas Eagle]

I gathered that but how could he possibly know who was there that the shooter knew? If I read the story right (which, I admit, it's possible I didn't) the guy who wasn't there said the shooter knew everybody who was there .

Granted, it was a small Montana town but I work in a sports bar in a smallish Northern Commiefornia town and I know most of our customers but I wouldn't go so far as to say that everybody knows everybody else.