russia who died in a firefight with police while tamerlan tsarnaev was in the region, right? >> that's right. what we're learning is that they're looking into the possible link between tamerlan tsarnaev and a young boxer, canadian turned jihadi. he and six others killed in the dagestan region in july 2012, exactly the same time that tamerlan tsarnaev was in the very same region. his body was prepared for burial by an imam july 14th. they believe it was brought down from the mountains and prepared for burial. a few days later, tamerlan left dagestan and went to moscow where he caught a plane to the united states. the time line of this is that tamerlan was actually waiting for his russian passport to arrive. he had applied at an office in dagestan, waiting for the document, the russian passport to arrive and he left without it.