Statement from the Office of Chief Medical Examiner on Neuropathology Findings for the Perpetrator of the Mass Shooting at 345 Park Avenue

September 26, 2025

The New York City Office of Chief Medical Examiner (OCME) has concluded its neuropathological examination in the case of Shane Tamura, who died by suicide after committing the fatal mass shooting at 345 Park Avenue in Midtown Manhattan on July 28, 2025.

NEW YORK - The New York City Office of Chief Medical Examiner (OCME) has concluded its neuropathological examination in the case of Shane Tamura, who died by suicide after committing the fatal mass shooting at 345 Park Avenue in Midtown Manhattan on July 28, 2025.

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.

CTE may be found in the brains of decedents with a history of repeated exposure to head trauma. The science around this condition continues to evolve, and the physical and mental manifestations of CTE remain under study.