IntelScoops

New York City – July 30, 2025 — Investigators have discovered that the gunman responsible for the deadly mass shooting at 345 Park Avenue acquired the rifle he used—and the vehicle he drove to New York—from his supervisor at a Las Vegas casino, authorities confirmed on Wednesday.

The suspect, 27-year-old Shane D. Tamura, an employee in the surveillance department of the Horseshoe Las Vegas casino, made a private purchase of an AR‑15-style rifle from his supervisor for approximately $1,400. He also reportedly obtained the black BMW he later drove straight across the country from the same individual.

Tamura traveled from Las Vegas to Manhattan, entering the 44-story building just before 6:30 p.m. on Monday. He opened fire first in the lobby—killing three people, including an off-duty NYPD officer—and then rode an elevator to the 33rd floor, where he fatally shot another victim before turning the gun on himself.

Authorities have disclosed a handwritten note found on Tamura in which he claimed to suffer from chronic traumatic encephalopathy (CTE) and accused the National Football League of concealing the risks of contact-sport-related brain injuries. Tamura, a former high school football player, allegedly intended to target the NFL offices, but reportedly ended up on the wrong floor.

Though the supervisor who sold the rifle has not been charged, city police emphasized that the legality of the sale is under review. Tamura had previously obtained a valid concealed carry permit—in June 2022—a fact that has raised questions following reports of his documented mental health history, including hospitalizations and a 2023 trespassing incident at another casino.

He also legally purchased a revolver weeks before the attack. Authorities recovered remains of ammunition, prescription medications, and a revolver box during a search of his Las Vegas home and vehicle.

Detectives from New York have traveled to Nevada to interview associates, execute search warrants, and trace how Tamura obtained the assault weapon. Investigations continue into possible lapses in firearm screening and broader regulatory loopholes.