It's good that the father is charged. Once again, as is always the case in these school shootings, the murderer has a history. Seriously, FBI??? And mental health issues. And a mom that has her stuff, and the list goes on. I opine this young man has a school file of intervention services offered and/or rendered several inches thick. It's no secret in this case, and it's no secret in all the cases I've followed, of school shootings. LE, counselors, therapists, psychologists, inpatient, outpatient, medication, ad nauseum.
The only way, in my humblest of opinions, being a born and raised U.S. citizen, fully aware of the society in which I reside, having 20 years experience in public school, and 5 years prior in residential treatment for youth with various and sundry disorders....the only way to provide for safety in a public school is to prevent the weapon from entering the building. I simply cannot, for the life of me, understand why courthouses, government buildings, airports, and a few other entities have secured their buildings, but public schools refuse to do so. Baffling.