article_snippet.sent: The defense, meanwhile, is expected to play up the role of Assistant U.S. Attorney Aloke Chakravarty 26-year-old brother, Tamerlan, in carrying out the attack.
article_snippet.sent: In closing arguments last week, defense lawyer Judy Clarke contended that Tamerlan was the driving force behind the bombing, with Dzhokhar following along.
article_snippet.sent: Tamerlan died during the brothers' chaotic final day of freedom.
article_snippet.sent: Three days after the bombing, the pair shot dead a police officer and carjacked a Chinese businessman as they attempted to flee the city.
article_snippet.sent: a Chinese businessman escaped and alerted police to police plans, setting the stage for a gunfight between the Tsarnaevs and law enforcement that ended when Dzhokhar roared off in the stolen SUV, running over Dzhokhar brother.
article_snippet.sent: The bombing killed restaurant manager Krystle Campbell, 29;