I picked this up from Netflix, but I believe you can watch it also here: http://video.pbs.org/video/2332614200/ It is very informative document about why things like Newtown happen. What makes kids turn into mass murderers. It also has some interesting information about how both early emotional connections, but also environmental factors during teenage years change person's brains. Also a bit about successful treatment of cold and callous (lacking empathy/conscience) young offenders. I especially recommend it to those of us, who have laid in their bedf awake at 3 a.m. fearing their child will grow into the next notorious school shooter. I'm sure I have not been only one here with that fear. For us it gives lots to think about but also some hope.