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			 In sharp contrast to the guilt phase of the trial, when lawyers 
			for the ethnic Chechen defendant did not contest that their client 
			had killed three people and injured 264 in the bombing, the next 
			four weeks are expected to feature emotional testimony from both 
			sides as Tsarnaev fights for his life. 
			 
			The question of whether Tsarnaev, 21, should live or die is highly 
			controversial around Boston. Polls have shown that a plurality of 
			area residents, 49 percent, prefer a life sentence, and family 
			members of two of the people he killed have also spoken out against 
			executing him. 
			 
			Citing Al Qaeda materials found on Tsarnaev's computers, and a note 
			suggesting the April 15, 2013 attack was an act of retribution for 
			U.S. military campaigns in Muslim-dominated nations, prosecutors 
			contend Tsarnaev wanted to "punish America" in an attack that showed 
			a callous disregard for human life. 
			 
			Defense attorneys have tried to paint Tsarnaev, who immigrated from 
			Russia a decade before the attack, as adrift and under the influence 
			of his older brother, 26-year-old Tamerlan, who died following a 
			gunfight with police hours after the pair shot dead an officer. 
			
			  "You're going to see more emotion in the testimony" in the trial's 
			next phase, said David Weinstein, a lawyer in private practice in 
			Florida who brought death penalty cases in prior work as a state and 
			federal prosecutor. 
			 
			"You can push the envelope a lot more in terms of what you're 
			presenting during sentencing." 
			 
			WHO WILL THEY CALL? 
			 
			Neither prosecutors nor defense lawyers have said publicly who they 
			will call as witnesses during the trial's next phase. 
			 
			Prosecutors are likely to call more people who personally knew the 
			victims, including the three killed by the bombs, 8-year-old Martin 
			Richard, Chinese exchange student Lingzi Lu, 23, and restaurant 
			manager Krystle Campbell, 29, as well as the Massachusetts Institute 
			of Technology police officer shot dead by the Tsarnaevs, Sean 
			Collier, 26. 
			 
			Richard's parents and Collier's sister have recently spoken out 
			publicly against the effort to put Tsarnaev to death. 
			 
			The defense is likely to call witnesses who are able to discuss the 
			relationship between the two brothers, whose family moved to the 
			United States when Dzohkhar Tsarnaev was 8 years old. 
			 
			While Tsarnaev's parents returned to Russia before the attacks, his 
			sisters, Bella and Alina, and Tamerlan's widow, Katherine Russell, 
			live in the United States. 
			 
			Tsarnaev's sisters visited him in prison, according to court 
			filings, but no members of his family have attended his trial. 
			 
			One hint of the sort of witnesses Tsarnaev's lawyers could call came 
			in a court filing Thursday by federal prosecutors objecting to a 
			defense suggestion that the judge ask the jurors to "look deep 
			inside" themselves when considering whether they believe the 
			testimony of foreign witnesses. 
			 
			
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			Family members could testify in person or by videotaped deposition, 
			said Walter Prince, a Boston defense lawyer. 
			
			"Outside of the family members, friends, relatives, neighbors and 
			other experts could talk about the domineering influence of the 
			older brother," Prince said. 
			 
			"Just about anything that can shed light on why this young man 
			should not be executed is going to be offered." 
			 
			FEW FEDERAL EXECUTIONS 
			 
			One thing that Tsarnaev has going for him is that very few people 
			are executed on federal charges in the United States. 
			 
			Just three out of 74 people sentenced to death since the 
			reinstatement of the death penalty for federal crimes in 1988 have 
			been executed, according to the Death Penalty Information Center. 
			The three were Oklahoma City bomber Timothy McVeigh, drug trafficker 
			Juan Raul Garza and Louis Jones Jr., a Gulf War veteran convicted of 
			raping and murdering a female soldier in 1995. 
			 
			Carried out between June 2001 and March 2003, those are the only 
			federal executions the United States has seen in the past half a 
			century. 
			 
			While McVeigh was also found guilty of terror-related charges, 
			others who were convicted of politically motivated violence have 
			been sentenced to life in prison without the possibility of parole. 
			They include Zacarias Moussaoui, one of the conspirators in the 
			Sept. 11, 2001, attacks, and shoe-bomber Richard Reid. 
			  
			
			
			  
			
			 
			Moussaoui and Reid are serving their sentences at the federal 
			"Supermax" prison in Florence, Colorado, where Tsarnaev will likely 
			be sent if sentenced to life rather than death. 
			 
			That suggests that even if the jury sentences Tsarnaev to death, he 
			may still serve a life term in prison while his lawyers appeal the 
			sentence, said Boston College Law School professor Robert Bloom. 
			 
			"The likelihood of him actually getting death is minimal," Bloom 
			said. 
			 
			(Editing by Bernadette Baum) 
			
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