As for the Bushmaster, I suspect he ‘liked’ the weapon from it being in video games and perhaps that influenced his mom in purchasing it. Anything is possible.
I hadn't thought of that....but otoh, he could have bought one himself as he had no criminal record that we know of.
Still, we have no proof other than what has been reported that she even owned one....I'm at the point now where I'm questioning everything about this story.