I don’t have a theory because we know what happened. We watched it unfold that day. It was pretty cut and dried.
Antisocial kid goes on a shooting spree. It’s not exactly the first time it has ever happened. Dozens of witnesses, dead mother, destroyed computer (just like the VT gunman).
You have to suspend a lot of logic to come up with an alternative narrative. All the Newtherisms have just been plain absurd.