April 26, 2016 9:35 pm Boyfriend Shoots, Critically Injures Girlfriend; Kills Self Police say the threat is over after a gunman barricaded himself in a building in Lawrence, Massachusetts, on Tuesday afternoon. US & World Videos 3:05 100 protesters detained at Northeastern University 2:39 Community mourns police sergeant killed on duty 4:32 Anti-war protester at Northeastern speaks amid arrests: ‘We are peaceful students' 5:39 Billerica police sergeant hit and killed by excavator during construction detail 2:30 Arrests made in string of home break-ins targeting Asian-Americans