September 9, 2019 3:40 am One Shot in Dorchester US & World Videos 1:41 Karen Read trial Day 7: Canton police officers continue to testify 1:57 Tensions escalate as protests across Mass. colleges continue 0:21 Man arrested in Centerville stabbing that sent victim to hospital 20:21 Karen Read trial: Defense calls Canton police lieutenant's credibility into question 1:59 Car crashes over wall in Westford