Right now the MSM is leaning toward "self-inflicted" for the killing wound. I will be really curious as to what the investigation finally shows, because that will really change the narrative one way or the other on the "gun control" narrative. Also I wonder if there could be more than one wound, possibly hit by the citizen, then killed himself later.
I wonder how many people might shoot themselves in the head while driving versus stopping (or crashing) first and then doing so because they figure they have no escape. Not that the shooter was rational, but a rational person, I think, wouldn't consider shooting themselves while they're moving and possibly have a chance for escape. That's usually a, "no place else to go" thing.