Overview

• The New York City Office of the Chief Medical Examiner reported “unambiguous diagnostic evidence” of low-stage chronic traumatic encephalopathy in 27-year-old Shane Tamura’s brain.
• Police recovered a three-page note in Tamura’s pocket blaming the NFL for concealing brain-injury risks and requesting that doctors study his brain.
• Tamura killed four people at 345 Park Avenue and then died by suicide from a self-inflicted gunshot to the chest; an NFL employee was seriously injured.
• Investigators say he drove from Las Vegas intending to reach the league’s offices but took the wrong elevator bank and carried out the attack elsewhere in the building.
• CTE can only be confirmed after death, and pathologists did not say it played a role; the NFL expressed condolences and noted the science on CTE’s effects remains under study.