Matt Lambert, Doctor in Washington Shooting Near White House, Had Health-Tech Career

Matt Lambert, a 55-year-old emergency physician and health technology executive, was identified as responsible for a shooting that killed one person and wounded four in Washington’s Logan Circle neighborhood on Thursday morning, Nov. 12. The incident unfolded about 1.5 kilometers from the White House and prompted a response by police and emergency crews that lasted for hours.

The person killed was James Stuart, 46, the manager of the condominium building where Lambert lived. Authorities said Stuart was shot inside a gym in the building. Lambert then returned to his seventh-floor apartment and fired from its balcony at people on the street, striking four people—two men and two women. One victim was in critical condition; the other three had injuries that were not considered life-threatening.

Lambert had built a career in emergency medicine and health technology, holding leadership roles at organizations involved in medical services and technology development. His work history included executive positions at Advantmed and Curation Health, as well as roles at NYC Health + Hospitals, Johns Hopkins Medicine and the University of Washington. He also served as a chief medical information officer at consulting and technology companies. Lambert founded and led MLEM, a consulting firm focused on bringing health care and technology together, and took part in professional events and discussions about medical innovation and management.

Investigators are examining whether the shooting was connected to a legal dispute between Lambert and the association that managed the building. In 2025, Lambert sued the homeowners association, alleging water leaks, dampness and mold in his apartment. Court documents said he claimed the damage had made the unit nearly uninhabitable and that he had spent approximately $300,000 on repairs. The association denied responsibility and also raised legal issues involving the gym on the building’s ground floor. The case was still ongoing at the time of the shooting.

Before the shooting, an account attributed to Lambert on X posted a document listing complaints about the apartment. The document was described as a kind of manifesto and included technical arguments about leaks and possible structural damage. Joel Braithewaite, Lambert’s former lawyer, told NBC News that Lambert considered the apartment his most valuable possession and felt he had been treated unfairly because the association had not been held accountable.

Washington police said the first shots were fired shortly before 8 a.m. inside the gym. After the shooting on the balcony, Lambert barricaded himself in his apartment and fired at officers through the door. Negotiators reached him by phone and tried to resolve the standoff without further confrontation. During the negotiations, Lambert reportedly started a fire after damaging a gas pipe; the building’s sprinkler system partly controlled the flames.

After officers heard a gunshot from inside the apartment, they entered and found Lambert dead from what appeared to be a self-inflicted gunshot wound. Three firearms were found at the scene. Police said the dispute with the building’s management is one line of inquiry, while stressing that the circumstances and motive remain under investigation.