LAS VEGAS (AP) — The man who stormed a Manhattan office tower with a gun, killing four people before killing himself, worked in the surveillance department of a Las Vegas casino, part of an industry built on watching for threats before they unfold.
Shane Tamura, 27, didn't show up to work his usual shift Sunday at the Horseshoe Las Vegas. Instead, authorities say, he got in his car and drove across the country to carry out a mass shooting inside the skyscraper that houses the National Football League’s headquarters. A fifth person, an NFL employee, was wounded in the Monday attack.
As investigators work to uncover a motive, questions are being raised about how a man with a documented history of mental health problems — and a recent arrest for erratic behavior at another casino — ended up working in one of the most security-sensitive jobs in Las Vegas.
Caesars Entertainment, which owns the Horseshoe, confirmed Tamura's employment but has yet to disclose the nature of his role or whether he was authorized to carry a weapon. A spokesperson didn’t respond to emails asking whether Tamura’s job required him to hold a valid work card from the state Private Investigator’s Licensing Board, which is needed to work as a private security officer in Nevada.
State licensing records show Tamura previously held a state-issued license as a private security officer, though it had expired in December.
While he held that license, Tamura was arrested at a casino in suburban Las Vegas. A report on the September 2023 arrest says he was asked to leave after he became agitated with casino security and employees who asked him for his ID, and he was arrested on a misdemeanor trespassing charge. Prosecutors later dismissed the case.
Tamura had a history of mental illness, police said without giving details. Authorities have not provided more specific information about Tamura’s psychiatric history but are investigating claims he included in a handwritten note he left behind, in which he said he had chronic traumatic encephalopathy, or CTE, a degenerative brain disease linked to repeated head trauma.
Officials said he had intended to target the offices of the NFL, which he accused of hiding the dangers of brain injuries linked to contact sports, but he took the wrong elevator.
Tamura's family members did not respond to messages seeking comment. No one answered a knock at the door of his family's Las Vegas home on Monday.
Tamura didn't play professional football but was a standout running back during his high school years in Southern California, where he was born, according to local news accounts at the time, including one that described his abilities as “lightning in a bottle.”
One of his former coaches, Walter Roby, said he did not remember Tamura sustaining any head injuries in his playing days. He recalled an ankle injury, "but that was the extent of it.”
“He was a quiet dude, soft spoken, humble and led by his work ethic more than anything else,” Roby told The Associated Press. “His actions on the field were dynamic.”
Some of Tamura's former classmates seemed stunned by the shooting, and several said they had lost contact with him.
But numerous others who say they were in Tamura’s grade at Golden Valley High School, which has over 2,000 students, weren’t familiar with him. Some of Tamura's neighbors in Las Vegas also said they didn't recognize him after seeing his photo shared in news reports about the shooting.
“They were so unremarkable, or maybe they were never home when I was home,” neighbor Wendy Malnak said about Tamura and his family.
Malnak, whose house is diagonal across from Tamura's, has lived in the neighborhood since 2022. She said many of the residents on what she described as a quiet street keep in touch regularly and look out for each other, and yet none of them seemed to notice Tamura or his family before police officers showed up Monday night and surrounded their house.
Las Vegas police said Tuesday they were “supporting the NYPD with their investigation" but have not released details about the police activity Monday at Tamura's home. Two groups of New York City detectives were on their way to Las Vegas to conduct interviews and search the home, New York City Police Commissioner Jessica Tisch said.
Authorities said they were also questioning an associate of Tamura who bought a component of the AR-15-style assault rifle used in the attack. Tisch said Tamura had “assembled” the weapon and used his concealed carry permit to purchase another firearm, a revolver, last month.
“This is part of a larger effort to trace Mr. Tamura’s steps from Las Vegas to New York City,” she said.
Mustian reported from New York. Associated Press journalist Safiyah Riddle contributed from Montgomery, Alabama.
CORRECTS TO NEVADA DEPT. OF MOTOR VEHICLES This undated image provided by Nevada Department of Motor Vehicles shows Shane Tamura. (Nevada Dept. of Motor Vehicles via AP)
The residence of Shane Tamura, identified as the gunman in the fatal shooting at a Manhattan office building in New York City and who was killed by a self-inflicted gunshot wound is seen on Monday, July 28, 2025 in Las Vegas, Nev. (AP Photo/Ty O'Neil)
A general view shows 345 Park Ave, a scene of Monday's deadly shooting, Tuesday, July 29, 2025, in New York. (AP Photo/Yuki Iwamura)
NUUK, Greenland (AP) — Troops from several European countries continued to arrive in Greenland on Thursday in a show of support for Denmark as talks between representatives of Denmark, Greenland and the U.S. highlighted “fundamental disagreement” over the future of the Arctic island.
Denmark announced it would increase its military presence in Greenland on Wednesday as foreign ministers from Denmark and Greenland were preparing to meet with White House representatives in Washington. Several European partners — including France, Germany, the U.K., Norway, Sweden and the Netherlands — started sending symbolic numbers of troops already on Wednesday or promised to do so in the following days.
The troop movements were intended to portray unity among Europeans and send a signal to President Donald Trump that an American takeover of Greenland is not necessary as NATO together can safeguard the security of the Arctic region amid rising Russian and Chinese interest.
“The first French military elements are already en route” and “others will follow,” French President Emmanuel Macron announced Wednesday, as French authorities said about 15 soldiers from the mountain infantry unit were already in Nuuk for a military exercise.
Germany will deploy a reconnaissance team of 13 personnel to Greenland on Thursday, the Defense Ministry said.
On Thursday, Danish Defense Minister Troels Lund Poulsen said the intention was “to establish a more permanent military presence with a larger Danish contribution,” according to Danish broadcaster DR. He said soldiers from several NATO countries will be in Greenland on a rotation system.
Danish Foreign Minister Lars Løkke Rasmussen, flanked by his Greenlandic counterpart Vivian Motzfeldt, said Wednesday that a “fundamental disagreement” over Greenland remains with Trump after they held highly anticipated talks at the White House with Vice President JD Vance and Secretary of State Marco Rubio.
Rasmussen added that it remains “clear that the president has this wish of conquering over Greenland” but that dialogue with the U.S. would continue at a high level over the following weeks.
Inhabitants of Greenland and Denmark reacted with anxiety but also some relief that negotiations with the U.S. would go on and European support was becoming visible.
Greenland's Prime Minister Jens-Frederik Nielsen welcomed the continuation of “dialogue and diplomacy.”
“Greenland is not for sale,” he said Thursday. “Greenland does not want to be owned by the United States. Greenland does not want to be governed from the United States. Greenland does not want to be part of the United States.”
In Greenland’s capital, Nuuk, local residents told The Associated Press they were glad the first meeting between Greenlandic, Danish and American officials had taken place but suggested it left more questions than answers.
Several people said they viewed Denmark’s decision to send more troops, and promises of support from other NATO allies, as protection against possible U.S. military action. But European military officials have not suggested the goal is to deter a U.S. move against the island.
Maya Martinsen, 21, said it was “comforting to know that the Nordic countries are sending reinforcements” because Greenland is a part of Denmark and NATO.
The dispute, she said, is not about “national security” but rather about “the oils and minerals that we have that are untouched.”
On Wednesday, Poulsen announced a stepped-up military presence in the Arctic “in close cooperation with our allies,” calling it a necessity in a security environment in which “no one can predict what will happen tomorrow.”
“This means that from today and in the coming time there will be an increased military presence in and around Greenland of aircraft, ships and soldiers, including from other NATO allies,” Poulsen said.
Asked whether the European troop movements were coordinated with NATO or what role the U.S.-led military alliance might play in the exercises, NATO referred all questions to the Danish authorities. However, NATO is currently studying ways to bolster security in the Arctic.
The Russian embassy in Brussels on Thursday lambasted what it called the West's “bellicose plans” in response to “phantom threats that they generate themselves”. It said the planned military actions were part of an “anti-Russian and anti-Chinese agenda” by NATO.
“Russia has consistently maintained that the Arctic should remain a territory of peace, dialogue and equal cooperation," the embassy said.
Rasmussen announced the creation of a working group with the Americans to discuss ways to work through differences.
“The group, in our view, should focus on how to address the American security concerns, while at the same time respecting the red lines of the Kingdom of Denmark,” he said.
Commenting on the outcome of the Washington meeting on Thursday, Poulsen said the working group was “better than no working group” and “a step in the right direction.” He added nevertheless that the dialogue with the U.S. did not mean “the danger has passed.”
Speaking on Thursday, Danish Prime Minister Mette Frederiksen said the American ambition to take over Greenland remains intact despite the Washington meeting, but she welcomed the creation of the working group.
The most important thing for Greenlanders is that they were directly represented at the meeting in the White House and that “the diplomatic dialogue has begun now,” Juno Berthelsen, a lawmaker for the pro-independence Naleraq opposition party, told AP.
A relationship with the U.S. is beneficial for Greenlanders and Americans and is “vital to the security and stability of the Arctic and the Western Alliance,” Berthelsen said. He suggested the U.S. could be involved in the creation of a coast guard for Greenland, providing funding and creating jobs for local people who can help to patrol the Arctic.
Line McGee, 38, from Copenhagen, told AP that she was glad to see some diplomatic progress. “I don’t think the threat has gone away,” she said. “But I feel slightly better than I did yesterday.”
Trump, in his Oval Office meeting with reporters, said: “We’ll see how it all works out. I think something will work out.”
Niemann reported from Copenhagen, Denmark, and Ciobanu from Warsaw, Poland.
Denmark's Foreign Minister Lars Løkke Rasmussen and Greenland's Foreign Minister Vivian Motzfeldt speak at a news conference at the Embassy of Denmark, Wednesday, Jan. 14, 2026, in Washington. (AP Photo/John McDonnell)
People walk on a street in Nuuk, Greenland, Wednesday, Jan. 14, 2026. (AP Photo/Evgeniy Maloletka)
From center to right, Greenland Foreign Minister Vivian Motzfeldt, Denmark's Ambassador Jesper Møller Sørensen, rear, and Danish Foreign Minister Lars Løkke Rasmussen, right, arrive on Capitol Hill to meet with senators from the Arctic Caucus, in Washington, Wednesday, Jan. 14, 2026. (AP Photo/J. Scott Applewhite)
An Airbus A400M transport aircraft of the German Air Force taxis over the grounds at Wunstorf Air Base in the Hanover region, Germany, Thursday, Jan. 15, 2026 as troops from NATO countries, including France and Germany, are arriving in Greenland to boost security. (Moritz Frankenberg/dpa via AP)
Fishermen load fishing lines into a boat in the harbor of Nuuk, Greenland, Wednesday, Jan. 14, 2026. (AP Photo/Evgeniy Maloletka)
Greenland Foreign Minister Vivian Motzfeldt, left, and Danish Foreign Minister Lars Løkke Rasmussen, arrive on Capitol Hill to meet with members of the Senate Arctic Caucus, in Washington, Wednesday, Jan. 14, 2026. (AP Photo/J. Scott Applewhite)
