Well I watched the video and read a couple articles about it.
The dad/shooter asks the question - What if this were your son? You'd do the same thing.
Indeed the dad was under duress with having lost his son, and I don't believe the punishment was too lenient for him.
Do I believe the pervert did something in which he deserved to die?
I believe the law is on the books that once a child is kidnapped and there is assault - then the perpetrator is automatically locked up for life.
But in this case, the dad was under duress..and truth be known I do not know what I would do if it were my kid. I hope I never have to answer that question.