Jurors have begun deliberating in the federal trial of a friend of Boston Marathon bombing suspect Dzhokhar Tsarnaev.

Robel Phillipos is charged with lying about being in Tsarnaev's dorm room at the University of Massachusetts-Dartmouth when two other friends removed a backpack and other potential evidence several days after the April 15, 2013, attack. Two bombs placed near the marathon finish line killed three people and injured more than 260.

During closing arguments Tuesday, Phillipos' lawyer said his client was in the room but never saw the backpack and couldn't remember some details because he had been smoking marijuana.

A prosecutor told the jury the case is "about someone who lied, not about someone who didn't remember."

Jurors got the case Tuesday afternoon.

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