JUST IN: Manhattan Gunman’s Chilling Note Is Revealed

The disgruntled gunman who killed five before taking his own life was reportedly seeking revenge on the NFL after a terrible health diagnosis, according to a chilling note discovered late Monday night.

The high-rise shooting spree took place in the wrong location for Shane Tamura, a former college football star who was searching for the NFL’s headquarters while stalking the streets of midtown Manhattan with a rifle. Tamura was found dead of a self-inflicted gunshot wound, but not before leaving a note blaming the league and admitting he believed himself to be suffering from chronic traumatic encephalopathy (CTE).

New York Mayor Eric Adams, appearing on Fox 5 NY’s “Good Day New York,” said the gunman entered the wrong set of elevators, placing him in the lobby of an investment management firm where employees barricaded themselves in their offices.

“It’s unfortunate that during these days and times, active shooter drills are taking place all across the country and Rudin Management did their job of clearly having those active shooter drills and the staffers who were in the building were able to utilize some of the safe rooms and I believe it played a great role in saving lives of some of the staffers,” he said.

Adams added that Tamura’s grievance appeared to be with the NFL.

“He seemed to have blamed the NFL,” the mayor said. “The NFL headquarters was located in the building, and he mistakenly went up the wrong elevator bank.”

Tamura was a standout high school football player at Granada Hills Charter in Granada Hills, California, about 25 miles outside of Los Angeles.

An initial search of his medical history showed Tamura had previously suffered from mental health problems, NYC Police Commissioner Jessica Tisch told reporters.

He worked in Las Vegas and had traveled cross-country, she explained. A highway camera pinged Tamura’s vehicle in Columbia, New Jersey, at 4:24 p.m. EST. Just hours later, he was firing indiscriminately on New York’s streets.

In a statement, NFL Commissioner Roger Goodell said one league employee had been “seriously injured.”

“As has been widely reported, a gunman committed an unspeakable act of violence in our building at 345 Park Avenue. One of our employees was seriously injured in this attack,” the message read, Fox News reported. “He is currently in the hospital and in stable condition. NFL staff are at the hospital and we are supporting his family.

“We believe that all of our employees are otherwise safe and accounted for, and the building has nearly been cleared.”