Prosecutor tells jury that friend of Boston Marathon bombing suspect Dzhokhar Tsarnaev lied repeatedly to the FBI during the investigation into the attack, while the friend's lawyer says his memory was clouded by heavy marijuana use - @AP
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
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