for our discussion, i'm joined by gregg mccrary, a former f.b.i.ler who has specialized in tracking and understanding violent predators. paul butler, a professor of law at georgetown university who teaches about race relations. and richard cohen, president of the southern poverty law center. richard cohen, what is your take on the question of domestic terrorism, especially in this particular case in charleston. >> i think it's a case of domestic terrorism. it's political violence by non-state actor aimed at intimidating a large group of people. it's the classic definition. also i think the technical definition under federal law. i think it's a pretty clear case of domestic terrorism. >> ifill: professor butler what is your sense not in this case but in general. >> it was surreal to here governor haley announce today the civil war ended 150 years ago like that was breaking news. i'm not sure she's right. what happened in charleston is a sped up version of the kind of violence that african americans have experienced for 400 years. we can talk about s