Boston August 12, 2018 11:20 pm Family Speaks About Man Murdered in His Mattapan Home Alex Allen’s father and his friend say they believe they know who killed the 55-year-old city worker in his Mattapan home. US & World Videos 4:32 Anti-war protester at Northeastern speaks amid arrests: ‘We are peaceful students' 10:42 Multiple people arrested as police clear campus encampments 1:40 Heavy police presence near on-campus protests 4:17 Police presence grows at pro-Palestinian encampment at Northeastern 5:39 Billerica police sergeant hit and killed by excavator during construction detail