Mugshot of Shane Tamura.
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EERIE messages have been spotted on the back of an apparent suicide note left by gunman Shane Tamura, who barged into a New York City skyscraper and murdered four on Monday.

The 27-year-old claimed he was suffering from a brain condition and gave investigators the password to his computer before turning the gun on himself.

Mugshot of Shane Tamura.

Shane Tamura, 27, barged into a New York City office building and shot four people to death before turning the gun on himselfCredit: AP
Surveillance video still image of Shane Tamura carrying a rifle outside a Manhattan office building.

Surveillance video captured him walking into the skyscraper carrying an M4Credit: AP
Handwritten note mentioning CTE, a request to study the brain, and an apology.

He scrawled eerie messages on a note that was found on his personCredit: Obtained by ABC News
FBI-NYPD Joint Task Force officer at night.

First responders raced to the scene after the shootingCredit: Getty

On Monday before 6 pm, Tamura pulled up to the Midtown Manhattan office building after driving for days from his home in Las Vegas, Nevada.

He barged into the skyscraper that housed elite businesses as the last 9-5 office workers filtered out, killing a New York City cop with an M4 rifle as soon as he walked in.

Tamura murdered an executive, who is a mom of two, and killed another security guard before taking the elevator up to the 33rd floor.

He arrived at the headquarters for the property management firm Rudin and killed a 27-year-old associate before shooting himself in the chest.

Beside his body, investigators discovered two notes, apparently from a day planner, which consisted of three pages of deranged ravings, police sources told ABC News.

In the handwritten scrawlings, Tamura claimed that he was suffering from a debilitating brain condition and accused the NFL of hiding the dangers of football.

Police believe Tamura was seeking to target the NFL, which is headquartered in the building that he stormed, New York City Mayor Eric Adams said.

The shooter played football in high school, but it’s unclear whether the sport left him with chronic traumatic encephalopathy, which has been found in some pro players who died by suicide and can only be diagnosed after a person’s death.

On the back of one note, an eerie message was printed on the paper that read, “Plan, pause, reflect & flourish,” pictures obtained by ABC News showed.

Under that, Tamura wrote “CTE chronic traumatic encephalopathy” and “Study by brain please I’m sorry.”

Illustration of gunman's journey and shooting rampage in NYC, including his route across the US and weapon.

Flags at half-staff outside 345 Park Avenue following a deadly shooting.

Flags flew at half-staff outside the 345 Park Avenue building, which was the scene of the shootingCredit: AFP

He told investigators to tell someone, “I’m sorry for everything” before giving his computer password.

EERIE HISTORY

Tamura was working as a security guard in the surveillance department for the Horshoe hotel and casino when he died.

First responders put him in two mental health crisis holds, once in 2022 and again in 2024, law enforcement sources told the outlet.

Normally, this involves someone being brought to a mental health facility or hospital where medical professionals provide care until the person is no longer considered a danger to themselves or others.

He grew up in Los Angeles, California, which is where he excelled on the football field as a teenager.

His dad, Terence Tamura, was a Los Angeles Police Department officer who served for 27 years before retiring in 2017, the LAPD confirmed.

Timeline of NYC shooting

A gunman stormed 345 Park Avenue in Midtown, Manhattan, on Monday night killing four before turning the gun on himself.

Cops are now investigating why the suspect Shane Tamura carried out the brutal attack and have released a preliminary timeline and are tracing back through his movements.

July 26 – Tamura drives through Colorado in his black BMW

July 27 – Tamura drives through Nebraska and Iowa. He also doesn’t show up for work as a security guard at a Las Vegas casino

July 28, 6.28pm – Reports of the shooting are first made to NYPD. Tamura had moments earlier double parked his car and walked across a plaza into 345 Park Avenue

Once inside, Tamura shoots off-duty officer Didarul Islam working as security dead

He guns down a woman attempting to hide behind a pillar as he sprays the lobby with bullets

Tamura walks towards the elevators where he shoots dead a security guard crouching at his desk

Gunman spares woman’s life after she walks out of elevator in front of him

He travels up to the 33rd floor to Rudin Properties’ office and fires as he walks the floor killing one

Tamura shoots himself in his chest ending his life and ending the rampage

7.52pm – NYC Police Commissioner Tisch posted on X: “the scene has been contained and the lone shooter has been neutralized.”

VICTIMS NAMED

Officer Didarul Islam, 36, security guard Aland Etienne, Blackrock executive Wesley LePatner, and Rudin associate Julia Hyman have been named as the four victims.

An NFL employee was also injured in the gunfire, but they are expected to recover, league commissioner Roger Goodell said.

LePatner was a mom of two who served on many charity boards for New York City institutions.

Etienne was mourned as a “brave” guard who was killed while standing between Tamura and the elevators.

Hyman was a star student at Cornell University who was on the Ivy League’s Deal List when she graduated in 2020.

She had worked for Rudin for less than a year when Tamura barged into the office.

Islam was a dad of two who was expecting his third child with his wife.

He was working as a security guard in the building during his office hours to make some extra money.

President Donald Trump said he was shocked and saddened to hear about the shooting in Manhattan, which he once called home.

In a Truth Social post, he wrote, “I trust our Law Enforcement Agencies to get to the bottom of why this crazed lunatic committed such a senseless act of violence.”

A handwritten note thanking neuroscientists and a CTE documentary, and expressing remorse.

A note was found by the shooter
Portrait of a man in a police uniform.

New York City police officer Didarul Islam was killed in the shootingCredit: Getty
Family portrait at the New-York Historical Society Museum & Library.

Blackstone executive Wesley LePatner (right), seen with her husband Evan LePatner in 2018, was also named as a victimCredit: Getty
Portrait of a man in a pink gingham shirt.

Security guard Aland Etienne died after the shootingCredit: Facebook/Aland Etienne
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