Cruz was throwing up every kind of red flag imaginable and nothing was done. The FBI was informed. Police and social workers were put on alert. He was expelled when he had bullets in his backpack. The family he lived with knew he had guns and was troubled (they were trying to get him therapy they say, but that doesn’t excuse all these signs). He tortured animals.
Whatever feelings you have on guns and gun control…this situation really calls out for a focus on mental health issues.