
A 27-year-old Nevada resident has been identified as the suspect in a Manhattan office building shooting that left four people dead and multiple others injured on Monday evening. Shane Devon Tamura allegedly entered 345 Park Avenue in midtown Manhattan armed with an M4 rifle and opened fire in the lobby and on the 33rd floor before taking his own life.

New York Police Commissioner Jessica Tisch confirmed that Tamura had recently driven across the country from Nevada to New York. Law enforcement partners in Las Vegas reported that Tamura had a documented mental health history, though his motives remain under investigation.
Among the victims was Officer Didarul Islam, 36, who was working security at the building. The other three victims have not been publicly identified. One additional person was hospitalized in critical but stable condition, while four others sustained minor injuries while attempting to flee.
Tamura’s black BMW, registered to him in Nevada, was found double-parked outside the building. Inside the vehicle, investigators discovered a rifle case containing ammunition, magazines, and a loaded revolver. Prescription medication belonging to Tamura was also found, though authorities did not specify the type or purpose.
Vehicle tracking data showed Tamura’s recent cross-country journey, passing through Colorado on Saturday, Nebraska and Iowa on Sunday, and reaching Columbia, New Jersey, at 4:24 p.m. Monday before entering New York City.
Former classmates and teammates from Granada Hills Charter School in Los Angeles expressed shock at the allegations. Tamura transferred to the school in 2015 as a senior from Santa Clarita and participated in the football program.
Former coach Walter Roby described Tamura as a talented running back who was “real elusive, real agile” and characterized him as a quiet, well-mannered student who worked hard and followed instructions. Roby said he was “blown away” by the news.
Classmate Caleb Clarke, who had recently reconnected with Tamura through social media, said violence was not something he would have associated with him. Clarke indicated that Tamura had been working at a Las Vegas casino.
Teammate Anthony Michael Leon, 25, described Tamura as someone who “never exerted bad energy or a negative attitude.” Leon noted that Tamura was enrolled in the school’s virtual program, attending classes online and appearing on campus primarily for football activities.
Leon recalled that Tamura earned all-conference honors but did not appear to harbor collegiate or professional football aspirations, unlike many of his teammates.
Security footage captured Tamura exiting his vehicle while carrying the rifle. The video showed him entering the lobby, turning right, and immediately opening fire on the NYPD officer. He then shot a woman taking cover behind a pillar and fired at others before taking an elevator to the 33rd floor, where he continued shooting.
The building houses offices for several major organizations, including the NFL, Rudin Management, KPMG, and Blackstone. NFL Commissioner Roger Goodell confirmed in a message to employees that a league staff member was seriously injured in the attack and remained hospitalized in stable condition.
Authorities continue investigating why Tamura targeted this specific location. The incident represents a significant security breach at a prominent Manhattan office building during evening hours when business operations were concluding.
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