Former L.A.-area football player who killed four in a Manhattan office building had CTE

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Evidence of “low-stage CTE” was found in a former San Fernando Valley high school football player who fatally shot four people and himself in Manhattan in July.

Shane Tamura, 27, left a three-page suicide note behind saying he believed he had the degenerative brain disease CTE and blaming it on football.

He drove from Las Vegas to New York to target NFL headquarters but ended up on the wrong floor of the office building.

Shane Tamura, the gunman who killed four people and himself in a New York City office building in July, had CTE, a degenerative brain disease linked to head injuries sustained in football and other contact sports.

The New York medical examiner “found unambiguous