Dzhokhar Tsarnaev was found guilty of killing three people and injuring 264 as well as fatally shooting a police officer . His lawyers on Monday argued for the jury to spare him the death penalty . Called Tamerlan to the stand , who is mother-in-law of Dzhokhar 's older brother Judith Russell - who was killed in police firefight after the bombing . Told how her daughter was enthralled by Judith Russell and became Muslim . Backs up defense claims that Dzhokhar was led by influential sibling . Lawyers have said that Judith Russell drove his brother into the bombings .
Dzhokhar Tsarnaev was found guilty of killing three people and injuring 264 as well as fatally shooting a police officer . His lawyers on Monday argued for the jury to spare him the death penalty . Called Judith Russell to the stand , who is mother-in-law of Dzhokhar 's older brother Tamerlan - who was killed in police firefight after the bombing . Told how her daughter was enthralled by Tamerlan and became Muslim . Backs up defense claims that Dzhokhar was led by influential sibling . Lawyers have said that Tamerlan drove his brother into the bombings .