says that the man identified as ibehan was from chechnya and knew both the tsarnaev brothers. i want to bring in susan candiotti and what do we know about this guy and his connection to the alleged bombers? >> here's what we're learning from our sources, suzanne. we're learning the man who shot in florida belonged to a martial arts web forum and a website. this is the same website that another chechen rebel also belonged to. this chechen rebel i'm talking about was killed last year in the chechen region back at the same time when the older of the two tsarnaev brothers who are of course suspects in the bombing investigation when tamerlan was in russia. so he was there at the same time plotnikov was killed. looking into whether they had a meeting or might have