NYC office shooter who criticized NFL had CTE in his brain, medical examiner says

• Shane Tamura had CTE in his brain, according to the New York City medical examiner's office. • Tamura shot and killed four people in a Manhattan office building before shooting himself. • He left behind a note saying "Please study brain for CTE" and criticized the NFL.

The man who shot and killed four people in a New York City office building in July before killing himself had CTE in his brain, according to the New York City medical examiner's office.

Shane Tamura, who carried out the shooting at 345 Park Avenue on July 28, left behind a three-page handwritten note that said "Please study brain for CTE."

CTE, or Chronic Traumatic Encephalopathy, is a brain condition associated with repeated head injuries. Symptoms include memory loss, impaired decision-making, personality changes,