Who is Terry Long, the NFL player mentioned in NYC gunman's note?

Editor’s Note: This article contains discussions of suicide. Reader discretion is advised. If you or someone you know is struggling with thoughts of suicide, you can find resources in your area on the National Crisis Line website or by calling 988.

MIDTOWN, Manhattan (PIX11) — Pittsburgh Steelers player Terry Long was mentioned in a suicide note belonging to the gunman who killed four people in a Manhattan office building Monday, according to authorities.

The offensive lineman played for the team from 1984 to 1991. He later died by suicide in 2005 after drinking antifreeze, and the Allegheny County Medical Examiner’s Office said chronic traumatic encephalopathy contributed to his death.

The National Institutes of Health defines chronic traumatic encephalopathy, or CTE, as a condition ca