Unfortunately, the evidence is stacking up (especially from members on various Discords; I'll let them all comment and what they've found). I'm inclined to believe at this stage that this child was the shooter, and has unfortunately taken his life and the lives of others who didn't need to die.
It brutally disappoints me that we would let any one of our own go off the deep-end like this. You're ultimately a product of the people and experiences you surround yourself with and so it's quite concerning, seeing a lot of the Discord and Steam images, how people were essentially encouraging his violent and anti-social tendencies.
You shouldn't feel obligated to stay within sub-communities that encourage the kind of behaviour that we've witnessed here tonight. I would implore others here that if you've got some deep stuff going on, you find somebody to talk to about it, and not somebody who is going to beat you down or laugh at your predicament. We've all got baggage and weight, but you don't have to carry it on your own.
I can come off like a major arsehole, so it doesn't have to be me, but there's plenty of people on this forum who like to play psychiatrist when the need arises.