i want to bring in former fbi profiler brad garrett. brad, we bring you in when tragedies like this play out. right now as it stands, state police confirming that the shooter went inside, believed to have had four weapons, had a vest on, one mother said a mask, and as always the case, we ask ourselves, what on earth would lead someone to do something like this? >> to the cliff, i have lost power, it could be something that he had a child in the school, he had a domestic dispute. driven this person right up to i have lost complete control of my life and i don't care anymore. as difficult for people to understand this, this is how they empower themselves, whether it be a few days ago in portland, oregon, or aurora, colorado, they put on an outfit, i'm going to call it a costume, because they're playing a different character, they're going in there and they don't view these children or the adults as human beings, they view them as the enemy, as people who have wronged them for whatever reason and they're going to seek revenge. unfortunately