Authorities revealed that the gunman who killed one person and injured four others in a mass shooting near a gym in Washington, D.C., has been identified as Dr. Matt Lambert.
The incident took place on the morning of Thursday, November 12, when Lambert, 55, shot five people in the city’s Logan Circle neighborhood. The shootings began at the VIDA gym, and Lambert later fled to an apartment building located above the gym.
Metropolitan Police Interim Chief Jeffery Carroll said during a press conference on Thursday that Lambert barricaded himself inside an apartment on the seventh floor of the building before he died by suicide.
Carroll explained that Lambert had been involved in a dispute with his homeowner’s association at the time of the mass shooting.
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Lambert — who was a licensed emergency medicine doctor and recently worked as a healthcare consultant — had previously filed a lawsuit against the condominium association, according to NBC Washington.
He reportedly claimed in the lawsuit that his apartment had mold and moisture issues after a contractor worked on the building.
The building manager, James Stuart, was killed in the shootings. One other person was critically injured, while three people suffered non-life-threatening injuries.
“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.
Lambert purchased the 1,200-square-foot penthouse in the building for $1.095 million in 2016. Five years later, he tried to sell the home for $1.275 million, according to online listings.
Joel Braithwaite, Lambert’s attorney, weighed in on the tragedy, saying, “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.”
Lambert filed the lawsuit in 2025, claiming that he began to notice mold, moisture and water problems in the apartment in 2024. He alleged that the damage cost him over $100,000, and he sued for negligence, breach of fiduciary duty and nuisance. Additionally, Lambert asked for a jury trial.
The litigation was ongoing, and a mediation was scheduled to take place in March 2027.
Braithwaite explained that Lambert had several residences, though his D.C. apartment was his “prized possession.”
“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.
Braithwaite added that he was surprised by the shooting and noted that Lambert had been in “great spirits” prior to the tragedy.
