NYC shooter Shane Tamura built AR-15 used in deadly rampage piece-by-piece — and his boss supplied a key part: sources
The assault rifle used in mass shooter Shane Tamura’s deadly rampage at a Park Avenue skyscraper was assembled piece by piece – with the critical part purchased by his boss, according to officials and sources.
The psycho’s supervisor at the Horseshoe Casino in Las Vegas allegedly supplied the Palmetto State Armory lower receiver for the AR-15 that Tamura used to kill four people, including an NYPD cop, sources told The Post.
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The lower receiver – which houses the trigger assembly, magazine well, and pistol grip – is the only AR-15 part classified as a firearm under federal law, and it requires a background check to buy.
“When you have an assault rifle of that sort, there are lower parts of the body, there are upper parts and different parts that assemble the gun,” Mayor Eric Adams said Tuesday.
“The lower part, we are finding out, was purchased by an associate. It is undetermined at this time if he played any role at all in planning or carrying out this action. This is what the investigation would reveal. We are now attempting to identify him and question him at this time.”
The other parts of the rifle can be purchased online or in gun shops — without any background check required.
The rifle was outfitted with a flashlight and a scope.
It isn’t considered a ghost gun because it has a traceable serial number.
Adams said a team of detectives are heading to Las Vegas – the city the shooter traveled from to carry out his bloodshed – to continue the investigation.
Tamura – who obtained a gun permit in 2022 and retained it after notifying authorities he was experiencing suicidal thoughts – stormed the 44-story building, which houses Blackstone and NFL headquarters, and opened fire around 6:30 p.m.
How the shooting unfolded
- Reports of the shooting at 345 Park Ave. start coming in around 6:28 p.m.
- Shane Tamura, 27, is seen getting out of a black BMW between 51st and 52nd streets with an M4 rifle.
- He enters the lobby and turns right, where he shoots police officer Didarul Islam, 36, dead.
- Tamura guns down a woman cowering behind a pillar in the lobby, sprays more bullets and walks toward the elevator bank — where he shoots dead a security guard crouching at his desk.
- One more man reports being shot and injured in the lobby. He was in critical but stable condition.
- The gunman allows a woman to walk out of the elevators unharmed before heading up to the 33rd floor, where building owner Rudin Properties’ offices are located, “and begins to walk the floor, firing as he traveled.”
- One woman is shot and killed on that floor before Tamura shoots himself in the chest.
- It’s unclear how long the mayhem lasted. Police Commissioner Jessica Tisch posted on X at 7:52 p.m.: “The scene has been contained and the lone shooter has been neutralized.”
Among the victims were NYPD Officer Didarul Islam, whose wife is pregnant with their third child; Blackstone executive and mother of two, Wesley LePatner; security guard Aland Etienna; and Julia Hyman, a management associate at building owner Rudin Management.
The mentally ill gunman left behind bizarre notes in his wallet claiming he had neurodegenerative disease chronic traumatic encephalopathy (CTE) — the brain disease linked to repeated blows to the head, commonly found in football players.
His scattered writings blamed football for his suspected case of CTE and begged for his brain to be studied in the wake of the massacre.
Adams confirmed Tuesday that the deranged shooter appeared to have been targeting NFL’s corporate headquarters, which has offices in the posh building.
Investigators are still probing an exact motive for the bloodshed.
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