He had ‘no record’ that would affect his purchase of a gun..and he lied about his mental health. Nothing anyone would have done would have stopped this shooter as he planned and executed these shootings for a very long time.
Had the authorities taken his violence and death threats seriously earlier on his butt would have been sitting in jail instead of smuggling bullets and guns into a stash in his school and then shooting up the place.
There are laws. He broke those laws... repeatedly. Those laws carry jail sentences. Presumably, people have been incarcerated under them. So why wasn’t he? Are they going to let him talk his way out of trouble again?
I am not blaming the person who sold the gun. The system failed that person as well as the community and all of those people who were shot.