A New York police investigator exits her vehicle at the scene outside a Manhattan office building where two people were shot, including a police officer, on Monday, July 28, 2025 in New York. (AP Photo/Angelina Katsanis) source

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Who is Shane Devon Tamura? What we know about the NYC shooting suspect

Besides an unstable mentally ill evil man, The 27-year-old Nevada man left a note at the scene voicing anger that his mental illness may be linked to his having played football, officials familiar with the investigation.

A Nevada man who recently drove across the country and has a “documented mental health history” is accused of walking into a Manhattan building with a rifle and opening fire Monday evening, killing four people, including an NYPD officer, police said.

Shane Devon Tamura, 27, went into 345 Park Ave. in midtown just after the end of business Monday armed with an M4 rifle and opened fire in the lobby and again on the 33rd floor before he eventually killed himself, New York Police Commissioner Jessica Tisch said.

“According to our law enforcement partners in Las Vegas, Mr. Tamura has a documented mental health history,” Tisch said. “His motives are still under investigation.”

Officer Didarul Islam, 36, who was off-duty working a security job at the building, was one of the four people killed in the attack. The other victims, a man and two women, have not been identified.

Suspect had driven across the country

Tamura has a Las Vegas address, and the BMW he got out of in Manhattan is registered to him in Nevada.

Inside the vehicle, investigators found a rifle case with rounds, ammunition magazines and a loaded revolver, Tisch said.

Also found was medication prescribed to him, Tisch said. She did not say what kind or what it was for.

Tamura’s vehicle had recently driven across the country, officials said.

It went through Colorado on Saturday, then Nebraska and Iowa on Sunday, and was in Columbia, New Jersey, as recently as 4:24 p.m. Monday, the day of the shooting — and it entered New York City shortly thereafter, Tisch said.

Why this location?

Tisch said security video showed the shooter get out of a double-parked black BMW while carrying an M4 rifle.

“The building security camera footage shows the shooter enter the lobby, turn right and immediately open fire on an NYPD officer,” Tisch said.

The gunman then shot a woman taking cover behind a pillar and fired at others before he took an elevator to the 33rd floor, where he opened fire again and killed another person, she said.

“We are working to understand why he targeted this particular location,” Tisch said.

Tenants of the building include the NFL, Rudin Management, KPMG and Blackstone.

Officials familiar with the investigation told NBC News that the suspect left a note at the scene voicing anger that his mental illness may be linked to his having played football. Investigators are looking into whether that is a why he targeted the Park Avenue building that houses the NFL offices, the officials said.

The officials stressed that the investigation is early and ongoing.

In addition to the weapon and ammo, a cellphone was found at the scene and attempts will be made to get in it to see what it might contain, the officials said.

Two officials familiar with the matter said that in the note found at the shooting scene, the suspect wonders about “CTE” as being a possible cause of his mental illness.

A man who was wounded in the attack was hospitalized in critical but stable condition Monday night, Tisch said. Four others sustained minor injuries trying to flee, she said.

NFL Commissioner Roger Goodell told NFL employees that a league employee was seriously hurt in what he called “an unspeakable act of violence.” The employee was in stable condition at a hospital, Goodell said in a statement.

California school teammates, coach are shocked

Tamura attended high school in Southern California, where he played football, according to his former teammates, who said they were stunned to learn he was a suspect in the shooting.

“You never would have thought violence was something you’d associate with him,” former classmate Caleb Clarke said. “Everything he said was a joke.”

Tamura transferred to Granada Hills Charter School in Granada Hills, a neighborhood in Los Angeles, in 2015 when he was a senior, coming from a school in Santa Clarita, Clarke said.

Clarke indicated that the pair lost touch but reconnected through social media recently and that Tamura worked at a Las Vegas casino.

Former coach Walter Roby said Tamura was a talented running back and “a great player” who was “real elusive, real agile.”

“He came in, worked hard, kept his nose down,” Roby added. “He was a quiet kid, well-mannered, very coachable. Whatever needed to be done, he would do.”

Roby said he was shocked that Tamura was suspected of carrying out a mass shooting.

“I’m just blown away right now,” he said.

In a 2015 Los Angeles Times article, Tamura was mentioned by his high school football coach ahead of his senior year. His coach said Tamura, a running back, was one of the few players he was “looking for big things from.”

A former Granada Hills teammate, Anthony Michael Leon, said he and his old football buddies have been texting one another in disbelief since they learned that Tamura was identified as the gunman.

“This is so shocking,” said Leon, 25. “I’m telling you, this was one of those kids who never exerted bad energy or a negative attitude.”

He said Tamura was in the school’s virtual program, which meant he took classes online and was in school only a couple of times a week outside of the football season.

But Tamura excelled on the field and led mostly by example, Leon said.

“He was quiet, but when he did actually talk, people listened,” Leon said.

Leon said that he remembered Tamura earning all-conference honors but that Tamura did not appear to harbor ambitions to play in college or the NFL.

“I knew so many kids in high school who made it clear that’s all they wanted to do,” Leon said. “I never got that from Shane.” source