Azamat Tazhayakov is charged with obstruction of justice and conspiracy for allegedly taking fireworks that had been emptied of their explosive powder, Tsarnaev's laptop and other items from his dorm room after last year's deadly bombing.
During the closing arguments today, prosecutor John Capin told jurors that the 20-year-old Tazhayakov knew Tsarnaev was a suspect after he recognized his friend in photos and video released by the FBI. Capin said Tazhayakov agreed with a friend to take items and throw them away.