Tsarnaev, 19, was described as a "dangerous terrorist" previously from Makhachkala who had been living in Cambridge. Boston suspect's father says he's a 'true angel'.
The younger Tsarnaev gave few clues as to his inner life on his profile on Vkontakte, a Russian equivalent of Facebook, though he did include websites about Islam among his favorites. Dzhokhar Tsarnaev attended School No. 1 in Makhachkala, the capital of Dagestan.