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			 Tsarnaev, a 21-year-old ethnic Chechen, early this month was found 
			guilty of killing three people and injuring 264 in the April 15, 
			2013, attack, as well as fatally shooting a police officer three 
			days later as he and his brother prepared to flee the city. 
			 
			In the first day of the sentencing phase of Tsarnaev's trial, the 
			jury heard from three people badly injured by the bombs and from the 
			father and brother of Krystle Campbell, a 29-year-old restaurant 
			manager who was one of the three people killed by the blasts. 
			 
			Campbell's father, William, described waiting at a hospital while 
			doctors operated on a person who they believed to be his daughter, 
			but who turned out to be a friend of hers. It was early in the 
			morning after the bombing when he learned his daughter had died. 
			
			  "That was a real bad day," he said. 
			 
			Prosecutors told jurors they would be hearing more about the lives 
			of the other fatal victims, 8-year-old Martin Richard, 23-year-old 
			Chinese graduate student Lingzi Lu and 26-year-old Massachusetts 
			Institute of Technology police officer Sean Collier. 
			 
			Defense attorneys opted not to make their opening statements on 
			Tuesday, instead planning to make them early next week when they 
			begin to call their own slate of witnesses aimed at persuading the 
			jury to spare their client's life. 
			 
			Their argument is expected to focus on 26-year-old Tamerlan 
			Tsarnaev, Dzhokhar's older brother, who died following a gunfight 
			with police hours after Collier's slaying. 
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			Defense attorneys have painted the elder Tsarnaev as the mastermind 
			of the bombing with Dzhokhar following out of a sense of familial 
			fealty rather than personal conviction. 
			 
			Anticipating that argument, Assistant U.S. Attorney Nadine 
			Pellegrini in her opening statement noted that both Tsarnaevs had 
			read al Qaeda's "Inspire" magazine, which offered instructions in 
			bomb making and that Dzhokhar Tsarnaev left behind a note suggesting 
			the attack was an act of retribution for U.S. military campaigns in 
			Muslim-dominated countries. 
			 
			(Reporting by Scott Malone; Editing by James Dalgleish) 
			
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