After four people are killed in an office tower, police are looking into the motive of the Manhattan shooter.
New York City – July 29, 2025 — A horrifying mass shooting at a high-rise office building at 345 Park Avenue, in Midtown Manhattan, left four people dead and several injured. Law enforcement authorities have now launched a full investigation to uncover the motive behind the shooter’s deadly actions, as the nation reels from another act of workplace violence.
The Incident
On the evening of Monday, July 28, at around 6:30 p.m., 27-year-old Shane Devon Tamura, a former football player from Las Vegas, entered the lobby of 345 Park Avenue armed with an M4-style rifle and wearing a bulletproof vest. Within minutes, he opened fire inside the lobby, killing multiple individuals including:
An off-duty NYPD officer, Didarul Islam, working as a security guard
One building staff member
Two other civilians working in the building
Tamura then took the elevator to the 33rd floor, which houses Rudin Management, before turning the weapon on himself in a hallway.
Trusted media outlets such as The Washington Post and Reuters have published detailed timelines of the events.
Shooter’s Background and Mental Health History
Authorities later revealed that Tamura left behind a handwritten suicide note, discovered near his body. In the note, he referenced suffering from chronic traumatic encephalopathy (CTE), a brain condition often linked to repeated head injuries in contact sports like football. He blamed the NFL for his mental health deterioration and requested that his brain be preserved for research.
Tamura had no known criminal record but was reported to have prior mental health struggles. He previously worked as a casino security guard in Nevada.
More details on Tamura's profile and possible mental health triggers are covered in People Magazine.
NYPD & FBI Response
NYPD Commissioner Jessica Tisch confirmed the gunman acted alone and stated that the investigation is now focused on verifying motive, digital communication, and travel history.
The FBI is assisting in forensics and behavioral analysis, exploring whether Tamura’s actions were premeditated or influenced by any ideological motives.
Public Safety Measures
In response, New York City Mayor Eric Adams announced that new security protocols will be reviewed for all high-rise commercial buildings in Manhattan. He also stated that the tragedy underscores the need for stronger mental health support and gun safety regulations.
Although NYC has seen a decline in violent crime in early 2025, this incident has raised serious concerns about gaps in mental health monitoring and high-rise building security.
đź“° Title
Police Investigate Manhattan Shooter’s Motive After 4 Killed in Office Tower
đź“ť Meta Description
After four people were killed in a shooting at a Midtown Manhattan office tower, police are investigating the gunman Shane Tamura’s motive. Read the latest on the incident and law enforcement response.
🏷️ Tags
Manhattan shooting, Shane Tamura, 345 Park Avenue, NYC news, office tower shooting, NYPD, CTE motive, gun violence, mental health and crime, workplace security
