Investigators spoke with the man in Rhode Island, the source said, after reports surfaced suggesting members of the suspected bombers' family blame a "Misha" for radicalizing alleged bombing mastermind Tamerlan Tsarnaev. The man, whose real name is Mikhail Allakhverdov, denies ever encouraging a violent take on Islam, and says he was not Tamerlan's teacher, according to a New York Review of Books writer who says he interviewed "Misha."