Boston July 25, 2017 12:45 pm BU Study Highlights Extent of CTE in NFL Out of 111 former NFL players whose brains were studied by Boston University, 99 percent had CTE. US & World Videos 2:19 Here's how to stay up to date on the Karen Read trial 0:45 Karen Read trial Day 3: Witness testimony resumes 1:56 Campus unrest continues at Boston schools 2:11 Pro-Palestinian protests continue at local colleges 2:03 Man shot by police in Raynham pointed gun at officers, bodycam footage shows