Scientists confirmed that ex-Falcons lineman had a brain disease linked to concussion . Ex-Atlanta Falcon player diagnosed with CTE after playing football for 20 years. His family reported troubling personality changes before his suicide .
Scientists confirmed that ex-Falcons lineman had a brain disease linked to concussion . Researchers believe the battering Shane Dronett took may explain his brain 's deterioration . His family reported troubling personality changes before his suicide .