A federal jury in the trial of a friend of Boston Marathon bombing suspect Dzhokhar Tsarnaev has now been deliberating for more than 15 hours without reaching a verdict.
Cambridge resident Robel Phillipos is charged with lying to the FBI about the deadly bombing.
Prosecutors say he lied 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. The items were removed hours after the FBI released photos of Tsarnaev and his brother as suspects.
Phillipos says he couldn't clearly remember what he did.
The jury began deliberating Tuesday afternoon and continued into Thursday afternoon.
Three people were killed and more than 260 were injured when two bombs exploded at the marathon finish line on April 15, 2013. Tsarnaev has pleaded not guilty.
