BOSTON — A jury has ended deliberations for the week without a verdict in the federal trial of a friend of Boston Marathon bombing suspect Dzhokhar Tsarnaev (joh-HAHR' tsahr-NEYE'-ehv).Prosecutors say Robel Phillipos lied to the FBI about being in Tsarnaev's dorm room three days after the bombing, when two other friends removed a backpack containing fireworks and other potential evidence.Phillipos' lawyers say he couldn't clearly remember what happened because he had smoked marijuana heavily that day.