Some additional information.
Seems to be an all around dirtbag. Broken home, drugs, violent and erratic behavior, expressions of intent beforehand, known to police from multiple domestic calls. And, I'm sure, covid lockdowns and Zoom school trashed his life further. Lots of kids never came back.
Not sure about the felon comment, though. That can't be in reference to the shooter, it would be been known immediately.
Texas school shooter was known to police, bullied by classmates
It was reported that the shooter, while living with his mother, was visited by police due to conflicts between the two.
thepostmillennial.com
Some of the same information here. Nobody seems too surprised it was him. Violent behavior, creeping on women, sending unsolicited gun pics to women.
Bullied for his "financial situation" but had the cash to pick up a DDM4, hmmm.