If the government had prior knowledge of Tsarnaev 's activities , it has n't disclosed it . NEW : Federal Public Defender Office in Moscow to question Dzhokar Tsarnaev after charges are filed . Russian President Vladimir Putin wants details from U.S. on bombing suspects . If physically able , he could be in court this weekend , expert says . Two U.S. senators say that Tsarnaev should be left without a lawyer .
NEW : Federal Public Defender Office in Moscow to question Dzhokar Tsarnaev after charges are filed . Russian President Vladimir Putin wants details from U.S. on bombing suspects . If physically able , he could be in court this weekend , expert says . Two U.S. senators say that Tsarnaev should be left without a lawyer .