A study of Vincent Jackson's brain showed the former NFL star was suffering from stage 2 CTE ... Jackson's family and medical experts revealed Thursday.
Dr. Ann McKee, the expert at Boston University who conducted the study on Jackson's brain, said the ex-Tampa Bay receiver had "multiple areas of the brain that were affected on both sides of the brain."
McKee noted to "Good Morning America" that oftentimes that level of the disease can lead to "violent behaviors" as well as depression and mood swings.