It is probably irrelevant but I can’t help but wonder...this guy apparently killed 11 people in a couple minutes and then stopped. I can’t help but wonder if he was horrified at what he had done when he had to face the result in real life up close.
He stopped after being shot several times.
You’re right it’s not relevant...decades of his own inner rage does not go away...He met his targeted goal to kill people. The only thing he’ll be horrified about is when he realizes prison is well beyond what he imagined.