t the time of the bombings, agreed their client was responsible for the deaths but contended he was less culpable than his accomplice, older brother Tamerlan Tsarnaev, who was killed by authorities following a four-day manhunt. A fourth victim, an MIT police officer, was shot and killed by the Tsarnaev brothers d

of those killed in the bombing was not at issue in the appeal. His lawyers have argued that Tsarnaev fell under the influence of his older brother, Tamerlan Tsarnaev, who was killed in a gun battle with police days after the bombing. Dzhokhar Tsarnaev was convicted of all 30 charges against him. Prosecutors portr

t the time of the bombings, agreed their client was responsible for the deaths but contended he was less culpable than his accomplice, older brother Tamerlan Tsarnaev, who was killed by authorities following a four-day manhunt. A fourth victim, an MIT police officer, was shot and killed by the Tsarnaev brothers d

leadership of the `Riyad-us Saliheen Suicide Bomber Battalion' in Dagestan. The Battalion is part of the broader `Dagestan Vilaiyat' group, which Tamerlan Tsarnaev, one of the Boston marathon bombers, had sought to join when he travelled to the republic in 2012. The emergence of ethnic Russian jihadists poses