Based on two comments by two different kids....the kid in question was a massive gamer. I think four weeks into the future....we will find that he was somewhat autistic and probably on some type of antidepressant drug routine.
He killed because he was bullied.
Just like Parkland killer was bullied.
We’re not paying enough attention to marginal and alienated kids.
The next shooting is only a matter of time somewhere and not just some kid wants to become a copycat killer.
Then there is the Andy Warhol 15 minutes fame thing - its a telling commentary the only time in their lives any one pays them attention is when they commit a deadly rampage.