The Supreme Court on Monday agreed to review a lower court opinion that wiped away the death sentence of Dzhokhar Tsarnaev, one of the brothers convicted in the 2013 Boston Marathon bombing that killed three spectators and injured hundreds.The Supreme Court on Monday agreed to review a lower court opinion that wiped away the death sentence of Dzhokhar Tsarnaev, one of the brothers convicted in the 2013 Boston Marathon bombing that killed three spectators and injured hundreds.