I'll let the professionals answer, but I would like to add a comment, as I usually do.
I have been a soldier for many years, and this is not a unique situation, where a soldier gets killed as a result of an action of another soldier.
The shooter in this case has a.... Let's back up a bit. The family of the dead soldier will hopefully be involved in a bereavement program, or some of the people from the OSISS will be talking with them. That's their call; it can't be imposed on them. It comes through the assisting officer and so forth. So that is available from the OSISS program.
The shooter has a couple of problems. You may recall the incident a year or two ago where the shooter has now been charged. You can imagine that young soldier—and I don't know the circumstances of the event—has in the back of his mind, “This was an accident, but am I going to be charged because the other chap was charged?” He has to face that. I'll let the professionals talk about it, but I'm talking about it from the soldier's point of view.
I am sure the soldiers would close ranks, remembering that most of the units, subunits, and so forth have been involved with peer support training. And that's formal and informal. It goes back to the three and a half hours of training at a recruit school. That's the formal. There's informal, when you're having a coffee break: “How am I going to overcome this problem? Have I got a problem? Who do I talk to?” In other words, your bed mate, your tent mate, is going to be there. I would like to think that this is where it starts. I know there are mechanisms where, if necessary, the command can direct the individuals to seek help.
I'm way out of my depth here, so I'll hand it over to Major Le Beau.