D.C. gym shooting leaves one dead, four injured

The suspect in a Nov. 12 shooting at a Washington, D.C., gym that killed one person and injured four others has died from a self-inflicted gunshot wound, according to reports.

The shooting occurred around 8 a.m. at a VIDA Fitness in the Logan Circle neighborhood, where the suspect is believed to have targeted an individual “that he had been in active litigation with over a condo issue,” NBC News reported.

According to the outlet, the suspect also “sprayed bullets” outside the gym including into a parking garage, according to CNN, before barricading himself inside what police believed to be his apartment. The suspect ultimately took his own life following an hour-long standoff with police. 

Anthony Mirones, who was inside the gym at the time of the shooting, described the scene, telling AP News, “The people in cardio had to step over the body.”

Three of the four injured people appeared to have non-life-threatening injuries, while one was in critical condition, police said, according to CNN.

Authorities identified the suspect as Matt Lambert, an emergency physician whose website states that he held leadership positions at institutions including Johns Hopkins Medicine and the University of Washington.

Police said Lambert reportedly had a conflict with his building’s homeowners association, MedPage Today reported. He filed a lawsuit in 2025 alleging that mold, moisture, and water problems had made his condo unusable, AP News reported, citing court records. Mediation was scheduled for March 2027.

Charles Webb, a resident of the building who was evacuated during the standoff, told NBC News he did not know Lambert personally but was familiar with his complaints.

“He’s been very active on social media, complaining about the situation that he had with our HOA,” he said. “And also a few similar emails that he sent within the association in the building. So, I know him, his name, and that he was very frustrated with the situation in his unit.”

Washington, D.C., Mayor Muriel Bowser called the shooting “a senseless act of gun violence,” according to a video shared by ABC News. Bowser also said the White House had been briefed on the shooting.