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			 In a filing in Boston federal court, prosecutors said they 
			objected to what they said was the defense's request that U.S. 
			District Judge George O'Toole instruct the jurors to consider 
			whether they are naturally prejudiced in favor of "people like 
			themselves" and if they tend to discredit the testimony of foreign 
			witnesses. 
			 
			The jury last week found Tsarnaev, 21, guilty of killing three 
			people and injuring 264 at the April 15, 2013, attack on the 
			marathon and three days later shooting dead a police officer. Next 
			week the jury will begin considering whether to sentence him to 
			death or life in prison without possibility of parole. 
			 
			Both prosecutors and defense witnesses are set to begin calling 
			another round of witnesses, with the trial's sentencing phase 
			expected to take four weeks before the jury begins deliberations on 
			Tsarnaev's fate. 
			
			  Thursday's objection by prosecutors was in response to an earlier 
			filing by the defense that, like a great many in Tsarnaev's case, 
			was submitted under seal and barred from public view. The 
			prosecutions' description of the defense filing could not be 
			independently verified. 
			 
			During the guilt phase of the trial, the jury heard from two foreign 
			nationals, a Chinese exchange student who was friends with one of 
			the three people killed by blast and a Chinese entrepreneur who was 
			carjacked by Tsarnaev and his older brother three days after the 
			bombing. 
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			The lists of witnesses to be called during the sentencing phase have 
			also been filed under seal. 
			 
			Defense lawyers argued during the trial's first phase that Tsarnaev 
			carried out the bombing not out of his own sense of grievance 
			against the United States but was simply following along in a plot 
			hatched by his 26-year-old brother, Tamerlan. 
			 
			Tamerlan died following a gunfight with police in the days after the 
			bombing. 
			 
			(Reporting by Scott Malone; editing by Andrew Hay) 
			
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