Man Who Targeted NFL HQ in July Mass Shooting That Killed 4 Had CTE

NEED TO KNOW

Shane Tamura killed four people in a New York office building shooting in July

Tamura, a former high school football player, had CTE, the New York City medical examiner said

Before dying from a self-inflicted gunshot wound, Tamura had written a note claiming he had CTE

Shane Tamura , the man who killed four people in a mass shooting at a New York City office tower before dying by suicide, had chronic traumatic encephalopathy (CTE) , a brain disease that has been linked to football.

Tamura, 27, entered 345 Park Avenue in midtown Manhattan on July 28 with an semi-automatic rifle and killed four people, including an off-duty police officer . The gunman died after shooting himself in the chest — leaving his brain intact for examination.

The building where the shooting