It isn't a strawman. It is a fact.
It does not really matter. I would say, the odds are pretty damn high, he did not have a carry conceal permit. Criminals don't care about the laws. In Indiana, you can not open or conceal carry a handgun without a license. And you can not get one if you have a felon record.
And we have already gone over the fact, that guns are not going away, no matter how much some want them to. I wish we did not need them also. But the fact remains, evil exists. Even in France.