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An FBI agent testified Thursday that friends of suspected Boston Marathon bomber Dzhokhar Tsarnaev knew he had materials to build an explosive.
FBI agent Farbod Azad, testifying in the obstruction trial of Azamat Tazhayakov, said that Tazhayakov told him that when he and two other friends of Tsarnaev were in Tsarnaev's dorm room hours before the shootout in Watertown, one of the friends found a container of Vaseline, held it up and mouthed the words, "he used this to make the bombs."
Prosecutors charge Tazhayakov took a backpack belonging to Tsarnaev that contained fireworks and his laptop and interfered with the FBI’s investigation.
Tazhyakov says he’s innocent, and Thursday his attorneys tried to undermine the FBI agent’s testimony by getting him to admit he couldn't recall key details about his interview with the defendant.