riot and social media threats of violence. he first communicated with them writing notes on a dry erase board. as it began he was sending a live feed from inside the truck to his facebook page. >> all right, guys. looks to me like i'm getting ready to make the phone call. >> reporter: he then made a long series of anti-government statements. a short time later facebook cut off the feed and took down his page. while it was active he showed glimpses of what could be a bomb. investigators reached out to his family members and searched his north carolina home looking for clues of what he might be up to. police sent a robot carrying a phone so they could negotiate with him but they said he never used it, just simply gave up. >> while most members of