Boston August 6, 2020 12:13 pm Man Shot and Killed in Mattapan No arrests have been made after a man was shot and killed Thursday morning outside a home in Boston’s Mattapan neighborhood, authorities said. US & World Videos 1:53 Opening statements begin in the Karen Read trial 2:31 Fallen Billerica Police Sgt. Ian Taylor honored at vigil 2:39 MIT president calls for shutdown of student encampments 0:16 4 people seriously hurt after boat sinks off Cape Cod 2:35 Fallen Billerica police sergeant honored during vigil