Man who killed four people in New York City building containing NFL headquarters had CTE

Medical examiner says autopsy of Shane Tamura, who played football in high school, showed evidence of brain disease

The mass shooter who suspected he had CTE when he killed four people and himself in a Manhattan office building in July did in fact have the degenerative brain disease, the New York City medical examiner said on Friday.

Shane Tamura, who was 27 and played football in high school, had unambiguous diagnostic evidence" of low-stage chronic traumatic encephalopathy, the medical examiner found. The condition, which can only be diagnosed posthumously, is caused by repeated exposure to head trauma and is most commonly associated in the US with tackle football players, in particular those who have made it to the NFL.