Gunman who killed 4 in Manhattan office tower that houses NFL had CTE, medical examiner confirms

The man who killed four people inside a Manhattan office tower this summer was suffering from a degenerative brain disease, a city medical examiner said Friday, confirming the gunman’s own self-diagnosis.

​ The man who killed four people inside a Manhattan office tower this summer was suffering from a degenerative brain disease, a city medical examiner said Friday, confirming the gunman’s own self-diagnosis. Read More Breaking News, Latest News and Videos | CNN