New York City Mayor Eric Adams said Tuesday morning that the man who fatally shot four people, including a New York Police Department (NYPD) officer, was likely targeting the employees at the NFL headquarters.

Adams said on Fox 5’s “Good Day New York” that the suspected shooter, Shane Tamura, who officials say later turned the gun on himself, indicated in a note found on him that he believed he was suffering from the brain disease chronic traumatic encephalopathy, or CTE.

“He alluded to having CTE from playing in the NFL. He never played in the NFL. He alluded to CTE being the reason for his illness. It appears as though he was going after the employees at the NFL,” Adams said.

“But we’re still going through the suicide note to zero in on the exact reason. But at this time, it appears to though something that is attached to his belief he experienced CTE from playing in the NFL,” Adams said. 

The mayor said Tamura, 27, of Las Vegas, ended up on the wrong floor in 345 Park Avenue, which also houses Blackstone and KPMG. 

“It was after 6 p.m. and so many people were no longer in the office, but he appeared to have gone to the wrong floor, and due to the wrong elevator bank of where you can see on the front desk, which elevator bank was the NFL. But he did not go to that bank,” Adams said. 

Tamura is accused of killing four people, including Didarul Islam, who had worked in the NYPD for over three years. 

Islam was an immigrant from Bangladesh who was married and had two kids. His wife is pregnant with their third child. 

Adams said investigators believe that Tamura acted alone. 

“And we understand that New Yorkers are shaken at this time, and you will see a visible presence of critical response teams that will be out at major shopping areas, but we don’t believe that there are any other gunmen that was participating in this action,” the mayor said.