Young man withdraws from his peers, skips school (from the 10th grade) starts acting very strangely, stops dressing well and grooming himself, gets rings around his eyes, starts posing with guns and posting all sorts of crazy things online. Then shoots up a school and is sentenced to death without a mandatory mental health examination.
IMO, the schoolteachers and counsellors who should have recognised that these are symptoms of severe mental illness, have failed miserably. And America, just like it always does, puts its hands up in the air, absolves itself of all social responsibility and hands down an execution.
And a couple of weeks later, it'll happen all over again somewhere else.