More details emerge about the Manhattan office shooting

Investigators yesterday began assembling a detailed picture of the 27-year-old gunman who, one day earlier, killed four people at a Midtown Manhattan office building before fatally shooting himself.

What they’ve found:

• Hours before the shooting, the gunman drove cross-country to NYC from Las Vegas, where he was working in a casino’s surveillance department.
• A note found in the gunman’s wallet claimed he had CTE, a brain disease caused by repeated head trauma, and also accused the NFL of covering up the dangers of football.
• The shooter appears to have intentionally targeted NFL employees at the league’s HQ in that office building, but used the wrong elevator and ended up on a different floor, according to NYC Mayor Eric Adams.
• The gunman was a former high-school football star in California. It’s unclear whether his playing career continued after, or whether he sustained any brain injuries related to athletics, though records show he was recently the subject of a mental-health crisis hold in Nevada.

Looking ahead…The NYC medical examiner’s office will perform an autopsy on the gunman in the coming weeks, including an examination of his brain for signs of CTE.