Authorities have identified the gunman behind a deadly mass shooting near a Washington, D.C., gym as Dr. Matt Lambert, a 55-year-old emergency medicine physician who was in the middle of an ongoing legal dispute with his condominium association.
Lambert shot five people in the city’s Logan Circle neighborhood on the morning of November 12, 2026, killing one person and injuring four others before dying by suicide. The gunfire began inside the VIDA gym and ended hours later inside a seventh-floor apartment in the building directly above the fitness club.
Matt Lambert Identified as Washington, D.C. Mass Shooter
Metropolitan Police Interim Chief Jeffery Carroll confirmed Lambert’s identity during a press conference, describing a gunman who began his rampage inside the gym before fleeing upstairs to barricade himself in a residential unit. Lambert was a licensed emergency medicine doctor who most recently worked as a healthcare consultant.
The person killed inside VIDA was James Stuart, the building manager. One of the surviving victims remains in critical condition after being shot in the head, while three others suffered non-life-threatening injuries.
Carroll said investigators quickly connected the violence to a civil matter Lambert had been pursuing against the people who managed his building. “We do know that the victim that was killed inside the VIDA was the building manager for that location. So, we do know that there has been an ongoing dispute between the suspect in this case and the building, condo, homeowners association, management regarding maintenance issues—mold and the like—that there was a civil case that he filed against them. So, we believe that it’s related to that,” Carroll said.
Inside Matt Lambert’s Condo Association Lawsuit
Lambert purchased the 1,200-square-foot penthouse inside the building for $1.095 million in 2016. Five years later, he listed the home for $1.275 million, according to online listings cited by NBC Washington.
Lambert filed his lawsuit against the condominium association in 2025, claiming he had started noticing mold, moisture and water problems inside the apartment in 2024 after a contractor worked on the building. He alleged the damage cost him more than $100,000 and sued for negligence, breach of fiduciary duty and nuisance. He also requested a jury trial.
The case was still active at the time of the shooting. A mediation session had been scheduled for March 2027.
Matt Lambert’s Attorney Speaks Out
Joel Braithwaite, Lambert’s attorney, said he was surprised by the violence and pushed back against any suggestion that the civil case had been a signal of what was to come.
“I don’t want the story to be that litigation led to this result. Litigation is supposed to prevent these results by having people litigate in court and not have that spill into the streets,” Braithwaite said.
Braithwaite said Lambert owned several residences but considered the D.C. penthouse his “prized possession.” He described a client who felt singled out by the people who ran the building.
“One of the issues for us was that Matt was treated differently than a lot of other people in the units, and that was the source of some consternation for us … and that’s what resulted in litigation, because to his mind, only his complaints were not heard and addressed by the condo association,” Braithwaite said.
According to Braithwaite, Lambert had been in “great spirits” in the days leading up to the shooting, giving no indication that anything was wrong.
What Happened Inside the VIDA Gym?
D.C.’s Metropolitan Police Department first alerted the public on social media that there was an active shooter in the area of 15th Street and P Street in Logan Circle on Thursday morning. During the press conference, Carroll said the shooting began inside VIDA, where one person was killed. Roughly 50 gym members evacuated after hearing loud bangs.
As officers moved through the scene, they cleared the gym and the apartment building on the same block. Authorities then heard gunshots coming from the seventh floor of the apartment building and determined the gunman had barricaded himself inside a unit.
Negotiators made contact with him and spoke with him for more than an hour before hearing a single gunshot. Officers forced their way into the apartment and found him dead.
Witnesses Recount the Gym Shooting
The attack left Logan Circle residents reeling, and one witness described the confusion of those first moments to WJLA.
“I hear a loud bang. So at first, everyone’s confused. I’m confused. Everyone else is confused. And I go towards the commotion area. And I see someone lying on the floor,” Anthony Mirones, who was inside the gym at the time, said.
Mirones recalled that another man with “a better view” of the shooting “looks back behind me and tells me, like, ‘He’s dead.’ So I’m like, ‘What?’”
“I get a little closer. I see he’s on the floor; I see some blood,” Mirones said. “So I think, OK, I’m connecting to all this loud bang. I think, ‘gunshot.’”
A fire alarm was pulled to get people out of the building. “Everyone evacuated eventually pretty quickly and then we’re outside the entrance of the Vida Fitness, and police officers start coming to run inside and then another police officer is outside the entrance asking ‘What’s the description of this guy?’” Mirones said.
Who Was Matt Lambert?
Before the shooting, Lambert had built a career in emergency medicine and had more recently pivoted to work as a healthcare consultant. Public records and his attorney’s account paint a picture of a man with multiple properties and significant resources who had grown fixated on a single legal fight over his D.C. home.
That fight will now outlive him only as a matter of civil record. For the families of the people he shot—especially Stuart’s loved ones—the question of why a long-running dispute over mold and maintenance ended in gunfire inside a neighborhood gym is one the courts can no longer answer.
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This story was compiled with the help of AI tools and edited by journalists.
