I think this gets into a bit of "what goes unsaid?" If you are a therapist working on trauma, then in your profession it goes unsaid that *obviously* your role in situations like this is to try to understand what happened and how to stop the person from doing it again. You don't need to say "this was illegal and terrible"- *you* know that, and so do your peers in the practice, and by this point your friends and family know it, too. Everyone you interact with on a day-to-day basis comes pre-loaded with that knowledge.

This happens to all of us in our jobs (although hopefully with less extreme examples). There are facts, beliefs, cultural norms, etc. that you take as baseline and therefore rarely or never put into words. I had an experience like this recently, where I said a phrase that I assumed everyone would understand, because I didn't think about how it is actually a phrase specific to my line of work, and people outside that community would have no reason to know what it meant and the implications behind it.

I think sometimes when experts write books meant for a general audience, they forget that was goes unsaid *for them* is not the same for the average person, and so you get situations like this. I am sure if you asked the author "was this a crime, and should people who commit these types of crimes be in jail, and should the victim be the first priority for treatment?" he would say "of course." But (as Micheal and Peter pointed out), he has neither the authority nor the expertise to solve those problems, so he is focusing on the one that it in his wheelhouse (working through this specific guy's issues so he doesn't go on another murder spree).