The killer gunman who opened fire inside the Manhattan building that houses the NFL was once a promising high-school football player, it has been revealed.
Authorities have identified Shane Tamura, a 27-year-old licensed private investigator from Las Vegas who once dreamed of a life in football, as the shooter who carried out a deadly rampage in the heart of New York City on Monday night.
Tamura walked into the lobby at 345 Park Avenue in Midtown Manhattan and sprayed a long-form M4 rifle, shooting an NYPD officer in the back, before heading to the offices of Rudin Management on the 33rd floor and continuing the terrifying spree. He then took his own life, police have confirmed.
At the time of writing four people have died after the shooting. One other victim was fighting for their life on Monday night.
As well as Rudin Management and investment management company Blackstone, the building at 345 Park Avenue is also home to the NFL headquarters, which is located on the fifth floor.
Sources confirmed Tamura did not enter that floor, yet investigators are looking into into whether his motive was to target the NFL’s offices given his past as a high-school football standout for Granada Hills Charter and Golden Valley in California.

The killer gunman who opened fire inside the Manhattan building that houses the NFL was once a promising high-school football player

Shane Tamura, a 27-year-old licensed private investigator from Las Vegas, has been identified
While he resided in Las Vegas, Tamura spent his high-school years in Los Angeles. He graduated from Granada Hills Charter, a Los Angeles Unified School District school located in the heart of the San Fernando Valley, in 2016. Prior to that he attended Golden Valley, which is further north in the Santa Clarita Valley.
According to high-school sports statistics websites MaxPreps and Hudl, Tamura operated as a defensive back, running back and halfback throughout his career in junior varsity with both schools.
In a video posted online from the 2015 season, he can be heard giving a post-game interview in which he spoke of a victory with the Granada Hills team.
Shane, who was instrumental in the win after scoring several touchdowns, said in the video: ‘We were down 10-0, stayed disciplined and came together as a team. Couple of touchdowns.’
The 2015 season, Tamura’s senior year, appears to have been his most successful as a high-school football star. He picked up six Player of the Game awards over the course of that campaign, while registering 126 carries for 616 rushing yards and five touchdowns in nine appearances.
In terms of receiving, the 5ft 7in, 140-pound player also registered 25 catches for 229 yards and two touchdowns.
Tamura also had 139 carries for 774 rushing yards and 11 touchdowns in 10 appearances for Golden Valley the season prior, as well as 16 catches for 103 receiving yards and a touchdown.
It is unclear whether his football career continued after he graduated from Granada Hills Charter in 2016. DailyMail.com has approached the school’s athletics department for comment.

Tamura walked into the lobby at 345 Park Avenue in Midtown Manhattan and sprayed a long-form M4 rifle before continuing his spree on the 33rd floor, killing a total of four people

A blood-stained image of the weapon used in the rampage was obtained by DailyMail.com

A police officer and at least six others were injured in the broad daylight attack in New York
Tamura eventually relocated to Las Vegas, where he earned a private investigator’s license and obtained a concealed carry permit to carry firearms, both legally granted through Nevada’s Sheriff’s Department.
The latter part of Tamura’s life is largely invisible to the public.
Investigators in both Nevada and New York are now urgently combing through his car, phone, and computer in search of answers to try and work out what stressors or perceived injustices led him to carry out Monday’s deadly shooting.
During a late night press conference NYPD Commissioner Jessica Tisch said the police found a rifle case with rounds, a loaded revolver, ammunition and magazines, as well as a backpack and medication prescribed to Tamura.
‘Police want to know what brought him to that building, who or what the target was, and what the grievance or motive behind it might have been,’ Miller explained.
‘These cases often involve people who experience a downfall and begin to blame others – bosses, institutions, society at large.
‘Then they decide to get even with everybody, even though in most cases, the problem is usually them,’ Miller said.
Investigators are also poring over Tamura’s social media footprint, hoping it might offer clues – manifestos, threats, cryptic posts, or grievances that might have foreshadowed his violent act.
As of now, police have not said whether Tamura had any personal or professional connection to the building or its tenants, but they are leaving no stone unturned.
Authorities say there’s no immediate evidence of any accomplices, but they are working methodically to verify that no other individual helped plan or facilitate his movements across state lines or into the high-security office tower.