My first comment on this is that, yes, it's terrible that a Vet was killed but let's not forget that there are a lot of people in the US and the World, ordinary people who may not be that much different than you or I, who are subject to violence. Not many talk about them.
Secondly, as a parent of a troubled young adult, it's easy to point fingers but there are no easy answers.
Brad
I was a troubled young adult and was on a path of escalating violence and intolerance, but having parents who were very engaged meant that early in process I started getting wake up calls.
In fact, my father ended up calling the police on me and having me arrested (without paperwork.) He worked with the police to come up with a plan to make amends which included going to every person of the 39 houses I had vandalized to tell them what I did, why I did it and write the check and hand it to them in person.
The scene is like this:
My father (former officer in the airborne with Ranger tab) requests my presence in the den. He sits me down and says in an eerily calm voice, "You know you have disgraced our family name, that nothing you have ever been taught excuses what you have done." Insert some of my teenage BS here... "I fought two tours in Vietnam against people like you. People who wanted to keep others from choosing how they could live and force them to live by their own rules and beliefs." Picture hulking, high school middle linebacker deflate to the size of a mouse.
He then itemized the disciplinary actions (most of which would occur before, in between and after summer two and three a day American football practices) in detail. This was not a short list and at the end I was terrified until he said the most important thing.
"But you will not have to do this alone. I will be there every step of the way." And he was. We went before he went to work, on his lunch break and every night. All $8000 I had saved to buy a car went to pay back the damage I did. Another $6000 of his which I eventually paid back. Most of the people were actually really cool and laughed about us being silly teenagers. There were a couple of powerful experiences that I won't go into here.
When we got to the last house, we encountered the only true hostility. The older gentleman had been targeted before by vandals and was incensed. When I got out of the car he was raking freshly cut grass. He raised the rake and was about to strike me with it when I father stepped between us, held up his hand and commanded, "STOP! My son knows what he did is wrong and he is here to make amends for it. You can listen to him and accept the money, or we are leaving. He is a good young man who just got confused."
The older gentleman set his rake down and listened to me admit my wrong, and silently accepted my check. Without a word he turned and went inside.
As I walked back to the car, I knew something fundamental had changed inside of me. I was different. When I tell this story, people who know me can hardly believe that the man they know today could do some of the things I did for about 4 dark years in my youth. My father and I are extremely close these days. A friend commented that he has never seen a father and son who treat each other as equals the way we do. That always puzzles me because it seems hard to think of your hero as your equal.