Gunman who killed 18 in Maine shooting had brain injury, study shows

Brain tissue analysis showed degeneration in the nerve fibers that allow for communication between different areas of the brain

Robert Card, an army reservist who shot and killed 18 people in Maine last year, had evidence of traumatic brain injuries, according to researchers who analyzed his brain tissue.

There was degeneration in the nerve fibers that allow for 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 Associated Press contributed reporting