You'll find that across the country, there is a disparity between what LEOs can do, and what the average Joe can do.
Even here in Virginia, a state with great gun laws, LEOs and Commonwealth Attorneys are allowed to conceal in restaurants that serve alcohol and consume alcohol. Everyone else may not... Regardless of what you think on the subject, it doesn't quite make sense that one group may do so while another may not.
And it's Killer Angel... as in the book