Most states have a legal definition, of which I am quite assured you are aware.
The shotgun was carried for self-defense. How is he supposed to conceal a shotgun? Not brandishing. Besides, you said gunpoint.
If you do not know how to carry a shotgun in a nonthreatening manner versus a threatening manner, you really should sell every gun you own for your own good.
It is not a subtle distinction.
As a matter of fact, I have carried an uncased shotgun down city sidewalks in a nonthreatening manner several times, and nobody batted an eye.