A gunman opened fire inside a Manhattan office building on Monday evening, killing four people and wounding a fifth before taking his own life. Among the victims was NYPD officer Didarul Islam, a 36-year-old of Bangladeshi descent, described by Police Commissioner Jessica Tisch as a hero who had served on the force for over three years. The shooter, identified as 27-year-old Shane Tamura of Las Vegas, acted alone and left behind a disturbing trail of clues, including a note that appeared to blame the NFL for a degenerative brain condition.

Details of the Shooting

Tamura arrived in New York after a cross-country drive, armed with an M4 semi-automatic rifle. Surveillance footage captured him exiting a BMW just before 6:30 p.m. and entering a building that houses Blackstone, KPMG, the Irish consulate, and NFL headquarters. Police say he walked into the lobby and immediately shot the NYPD officer working security, followed by a woman and two men. One woman was allowed to pass unharmed. Tamura then took an elevator to the 33rd floor, killed another individual, and turned the gun on himself.

The shooter left a note suggesting he suffered from chronic traumatic encephalopathy (CTE), a brain disease associated with repeated head injuries. Though Tamura never played in the NFL, he had played high school football in California. New York Mayor Eric Adams told CBS News the shooter blamed the league for his alleged condition. CTE has been linked to aggression and memory loss, and the NFL has settled over $1 billion in concussion-related lawsuits with former players.

Motive and Background

Manhattan Shooter Shane Tamura
The perpetrator, Shane Tamura.

Inside Tamura’s vehicle, police discovered a loaded revolver, ammunition, medication, and a rifle case. He had a valid concealed carry permit from Las Vegas and had recently worked as a security guard. According to ABC News, Tamura had been held under mental health crisis orders twice—in 2022 and 2024. Commissioner Tisch confirmed that Tamura’s rampage ended on the 33rd floor inside the offices of Rudin Management, not the NFL, likely due to a mistake in accessing the building’s elevator bank.

Victims included Wesley LePatner, a senior executive at Blackstone, and several others who were injured and hospitalized. NFL commissioner Roger Goodell confirmed in a memo that an NFL employee was among the injured, adding that increased security measures would be in place in the coming weeks. The tragedy rattled the surrounding financial district, which had already seen another high-profile shooting nearby last year.

Public Response and Investigation

President Donald Trump extended condolences to the families of the victims, specifically acknowledging Officer Islam’s sacrifice. Loeb & Loeb’s co-chair Mitchell S. Nussbaum, whose law firm occupies floors 18 through 22 in the same building, said, “We are very saddened about the tragic loss of life … thankfully, everyone at (our) firm is safe.”

Police continue to investigate the circumstances surrounding the attack. Tamura’s note reportedly claimed his football career had been cut short by brain injury, though he never played professionally. His former coach at Granada Hills Charter School described him as a *quiet, hard worker* and one of the top offensive players at the time. Tamura’s tragic spiral and violent end highlight ongoing concerns over untreated mental illness and access to high-powered firearms.