BOSTON (Reuters) - Three college friends of accused Boston Marathon bomber Dzhokhar Tsarnaev pleaded not guilty on Friday to charges that they helped cover his tracks when the FBI was trying to find the people responsible for the April 15 attack.
All three are charged with going to Tsarnaev's dorm room three days after the bombing and removing a laptop and a backpack containing empty fireworks shells after receiving a text message from him telling them to "go to my room and take what's there," according to court papers.