May 21, 2018 6:50 am Police Captain's Son Expected to Plead Guilty in Terror Plot A Boston police captain’s son who is accused of plotting a terrorist attack on a college campus to support the Islamic State group is expected to plead guilty. US & World Videos 4:17 Police presence grows at pro-Palestinian encampment at Northeastern 5:39 Billerica police sergeant hit and killed by excavator during construction detail 2:31 Celtics preparing for pivotal Game 3 against Heat in Miami 2:37 Quincy detective resigns amid allegations of ‘unwelcome, sexually explicit conduct' 4:07 Officer hit and killed while working construction detail in Billerica, authorities say