Gunman in Maine's deadliest mass shooting, Robert Card, had significant evidence of brain injuries, analysis shows

Augusta, Maine — Robert Card, the Army reservist who shot and killed 18 people in Maine last year, had significant evidence of traumatic brain injuries, according to a brain tissue analysis by researchers from Boston University that was released Wednesday.

There was degeneration in the nerve fibers that enable communication between different areas of the brain, inflammation and small blood vessel injury, according to Dr. Ann McKee of Boston University's Chronic Traumatic Encephalopathy (CTE) Center. The analysis was released by Card's family.

Card had been an instructor at an Army hand grenade training range, where it is believed he was exposed to thousands of low-level blasts.