Massachusetts March 13, 2024 11:18 pm Mass. State Police investigate trooper involved in Karen Read investigation Michael Proctor, the lead investigator in the Canton murder of Boston Police Officer John O’Keefe, is the subject of an internal investigation. US & World Videos 0:39 Large protest closes Mass. Ave. near MIT 2:11 Julie Nagel takes the stand in Karen Read trial 0:33 Marshfield middle school on lockdown after incident at Starbucks 1:55 Karen Read trial Day 12: Julie Nagel to testify again 2:07 Bruins force Game 6 with win over Panthers in Florida