Tink, Ravyn and Special K, I am so sorry you've had these tragedies in your family.
I agree that the WTS bears responsibility for placing men in the position of counselor when they have no training. The WTS has ignored the mental needs of the other sheep since it's inseption (sp?).
I am wondering about this family though. One article mentioned that he had become more actively religious recently. So I see this guy pushing to meet higher standards of dubdom maybe reaching out for MS or the big E. Anything to keep his wife happy. They've been fighting, he said she was cheating on him. We don't know about that yet. Killing the son was a punishment to the wife, but he [the father]selfishly ignored the kids interests completely. And the gun? I know many JWS with hand guns and many more with rifles. Heck he'd probably threatened her before with it. In fact I don't think she realized the danger her son was in because as many here have said, his threats had been made before.
So what if she was having an affair? It seems to me that is often the reason for this type of control freak murder suicide. It's like "Ok you don't want me, you don't get my piano playing genius kid either." The congregation will make all kinds of supositions. People will begin to avoid her, because, well something bad about a woman whose husband kills himself and his child. And if she did have a boyfriend --- they'll crucify nail her.
And as far as depression if you're a Jdub --- well my experience was that when I was going for psychotherapy and the doc put me on meds the Elders were concerned over my spirituality (I also began school at this time). My husband offered to step down. Eventually one brother elder brought up that maybe Nick needed to be removed. Thankfully he was there to hear this, and reminded them that he had offered to step down. Without the support of my husband and psychiatrist I would have eventually completed the deed. I saw many women borg who were committing passive suicide... WTS is no way to live.