Midtown Manhattan mass shooting gunman had low-stage CTE, medical examiner finds

Shane Tamura, the gunman that killed four people in July's deadly Midtown Manhattan shooting , had low-stage CTE, officials said Friday.

New York's Office of the Chief Medical Examiner revealed the results Friday.

"Following a thorough assessment and extensive analysis by our neuropathology experts, OCME has found unambiguous diagnostic evidence of Chronic Traumatic Encephalopathy, also known as CTE, in the brain tissue of the decedent. The findings correspond with the classification of low-stage CTE, according to current consensus criteria," OCME said in a statement.

Tamura, a 27-year-old former high school football player, shot and killed Aland Etienne , Wesley LePatner , Julia Hyman and NYPD Det. Didraul Islam on July 28. He then shot himself in the chest.