protesters the idea that this is sanctioned violence and they are allowed to engage in this violence and therefore should be prepared at the next rally to bring even more violence. >> so, michael, what groups did you go undercover with and what was that like? >> so there were a number of groups that i was involved in. i did a case in the early 1990s involving neo-nazi skin head groups that worked across a broad array of different nazi groups, white supremist group, white nationalist groups. and you have to understand at the criminal level the names are less important. they can shed the names like they change their clothes. so it's a little bit more complex than i think the general public understands or even actually law enforcement understands. >> were you ever fearing for your life? did it ever get that hairy? >> certainly. they had a lot of guns and i was