Massachusetts March 1, 2020 6:39 pm Double Stabbing Victims Identified as Suspect's Mother, Step-Father Investigators say 27-year-old John Brittan stabbed his mother and step-father on Saturday, killing his mom and injuring his step-father. 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