Editor's note: @NBCNews is reporting that a Cambridge, Mass., man, Stephen Silva, has been arrested on drug and gun charges and was the source of the gun that killed Sean Collier, the MIT police officer killed by the Boston Marathon bombing suspects. - Grace
Friend of the accused Boston Marathon bombing suspect did not speak involuntarily when telling FBI agents about the removal of a laptop and backpack from the suspect's room and his statements are admissible as evidence, US judge says - @Reuters
Lawyer for man charged with obstructing the investigation into the Boston Marathon bombing denies his client removed a laptop and backpack containing fireworks from the bombing suspect's dorm room 3 days after the attack - @Reuters
Friend believed suspect Dzhokhar Tsarnaev was behind the Boston Marathon bombings when he removed materials he thought had been used to make the bombs from his dorm room, prosecutors say at trial on obstruction charges - @Reuters
Kazakh exchange student awaiting trial on charges of obstructing the investigation into last year's Boston Marathon bombing testifies he told federal agents he suspected his friend, accused bomber Dzhokhar Tsarnaev, took part in the deadly attack - @Reuters
Tamerlan Tsarnaev, 26, and his 19-year-old brother, Dzhokhar Tsarnaev, are accused of setting off the two bombs near the finish line of the Boston Marathon on April 15, 2013, that killed three people and wounding more than 180 others.
Three days later, investigators say they killed a university police officer, carjacked a man and led police on a chase that resulted in a shootout that left Tamerlan Tsarnaev dead. His younger brother escaped, but was captured the next day, alive but badly wounded. - AP