Updated: Apr 9 2021, 6:10 ET Invalid Date, PHILLIP Adams' concussions could have triggered a degenerative brain disease which led to a killing spree that left five people dead, an expert has claimed. Adams fatally shot Dr Robert Lesslie, 70, his wife, Barbara, 69, and their two young grandchildren at the couple's home in South Carolina on Wednesday. 11 11 Adams fatally shot Dr Robert Lesslie, his wife and two grandkids at the couple's home in South CarolinaCredit: AP 11 Dr Hallie Zwibel said the concussions could have led to a degenerative brain disease known as chronic traumatic encephal...