It's irrelivent that he used firearms to injure and kill those people, however, he was a genetic dud, and should not have rights, or freedom, he should've been in a padded room drinking lemon water from a sippy cup.
See, if America wasnt so caught up in not hurting peoples' feelings, and realizing that if a kid who gets picked on and kills people was messed up in the first place, there wouldn't be blame for the firearms, I don't have enough time to explain how I would fix the problem, but in my America, we wouldn't have any school shooters, we would have appropriate mental care, aka loony jail.
That is all, god bless the dead, and please pray for the survivors.