Interesting thing I learned at a training once: in a active shooting situation with both armed “good” civilians and armed “bad” civilians, shoot the ones that don’t have a holster or aren’t using a sling. Statistically speaking, good guys always use holsters and/or slings. Bad guys rarely, if ever, do.
I got a chuckle out of it at the time, but all this time later, I’ve never seen it disproven.
So, if I stepped out of a PD and saw these fellas, my first thought would be “sling, holster.... I wonder what I’m getting for lunch....”
Wouldn’t you be a bit worried about the one in the white tee shirt?