Jury was shown pictures of pressure cooker bomb Dzhokhar Tsarnaev allegedly threw at police four days after Boston Marathon bombing . Prosecutors also presented evidence of jihadi materials on the accused terrorist 's laptop , including a Watertown bombing-making guide . Tsarnaev , 21 , faces the possibility of the death penalty if convicted for the April 2013 attacks . His brother Tamerlan is believed to have carried out the attacks with him , but died in a gunfight with police in the aftermath of the bombings .
Jury was shown pictures of pressure cooker bomb Dzhokhar Tsarnaev allegedly threw at police four days after Boston Marathon bombing . Prosecutors also presented evidence of jihadi materials on the accused terrorist 's laptop , including a DIY bombing-making guide . Tsarnaev , 21 , faces the possibility of the death penalty if convicted for the April 2013 attacks . His brother Tamerlan is believed to have carried out the attacks with him , but died in a gunfight with police in the aftermath of the bombings .