of slaughters to continue to happen. >> martha: well, it really comes down to the question of evidence in terms of what the school had. we know that the night before the shooting ethan crumbley tweeted now i have become death, the destroyer of the world. see you tomorrow, oxford. this was on his open twitter account. that was after he was disciplined. so that was a public thing. but the problem is something that you just touched on and then i want to ask you about the responsibility of the school and how suable the school is for this. this is what sheriff bouchard told me when i asked him why didn't the school contact you. wouldn't that have been the right thing to do? watch this. what would you say to the school about when they should have contacted your department? >> as soon as behavior is described or considered troubling by the school teachers, the administrators. bring us in to that consult. it triggers a whole series of