United States April 18, 2018 11:23 pm Judging the System: 3 Police Officers Killed, 3 Career Criminals Charged Two police chiefs are calling for change to a system that has freed three violent offenders who went on to kill three police officers. US & World Videos 3:05 100 protesters detained at Northeastern University 2:39 Community mourns police sergeant killed on duty 2:50 Community mourns Billerica police sergeant killed on duty 4:32 Anti-war protester at Northeastern speaks amid arrests: ‘We are peaceful students' 10:42 Multiple people arrested as police clear campus encampments
