Thanks. That especially explains more about the "Terry stop". In applying it to this case, the cops had reasonable suspicion since just the presence of a gun under the circumstances, could be viewed as that. The guy wasn't detained unless he refused to talk to them by just shouldering on by and saying nothing. At that point, they could have detained him and questioned him about the circumstances of his open carry. The reasonable suspicion would have evaporated rather quickly though and if he was schooled at all on how to behave, could have been on his way legally, by merely pausing and answering a couple of questions. He could have almost shouldered on by...legally.

If he'd have said the things I noted he could have just gone on unless there had been a specific crime committed with a gun in the vicinity he was observed coming from or where he'd been observed by the people who called it in.

About right?