A shooting incident in Washington, D.C. has shed light on a prolonged disagreement concerning mold, moisture, and water damage at a luxury penthouse. This dispute is suspected to have motivated the deadly attack that occurred near Logan Circle.
Authorities have identified the shooter as 55-year-old Dr. Matt Wade Lambert, an emergency medicine physician who had been working as a healthcare consultant. Lambert owned a seventh-floor penthouse in the Metropole condominium building, acquired in 2016 for roughly $1.095 million, and was a member of the gym located on the ground floor.
According to investigators, Lambert had been in a protracted conflict with the condominium association regarding maintenance issues that he claimed rendered his unit uninhabitable since 2024. Legal documents indicate he filed a lawsuit in March 2025, alleging that construction work on the building’s exterior led to severe water intrusion, black mold, and damages exceeding $100,000.
In response, the association attributed the problems to excess moisture from laundry dryers located in the gym below and mediation was scheduled for the following March.
Interestingly, Lambert had an account on X titled OfMiceandMold, where he chronicled his complaints and shared a “manifesto” in the form of an engineering report shortly before the shooting took place.
Washington, DC, gym shooting suspect Dr. Matt Lambert, an emergency room physician, killed one person and injured four others before taking his own life.
Lambert had sued his condominium association over alleged mold contamination, a dispute investigators are examining as a… pic.twitter.com/CkaFc89rzo
— AF Post (@AFpost) November 12, 2026
Interim Metropolitan Police Department Chief Jeffery W. Carroll indicated the shooting stemmed from the ongoing disputes with the homeowners association, emphasizing the civil case Lambert filed against them. He stated, “We believe that it’s related to that.”
Councilmember Brooke Pinto, representing the area, remarked on the gravity of the situation, noting, “It’s just so sad and so senseless to kill someone over a dispute that should be worked out reasonably.”
The tragic events unfolded shortly before 8 a.m. on Thursday, November 12, within the Vida Fitness gym near 15th and P streets NW. Police indicate that Lambert entered the gym and shot 46-year-old James Stuart, the property manager, who had also been a member of the gym.
Stuart was pronounced dead at the scene after sustaining his injuries. Lambert subsequently returned to his penthouse, barricading himself while firing from the balcony with a rifle, injuring four others—two men and two women. One of the injured victims suffered a gunshot wound to the head.
As of Thursday evening, one individual remained in critical condition, while the others had non-life-threatening injuries. Law enforcement responded promptly to the scene and recovered three firearms from Lambert’s apartment, including the handgun used in the gym and a rifle from the balcony, all unregistered in the District of Columbia.
During negotiations with the police, Lambert voiced grievances against the homeowners association and ignited a fire that ruptured a gas line within his unit. After an hour of tense exchanges, officers heard a gunshot from inside, forced entry, and discovered Lambert with a self-inflicted gunshot wound. He was pronounced dead at the scene.
This event led to a significant police response, a neighborhood shelter-in-place order, and temporary lockdowns at nearby schools before the authorities declared the area safe later in the morning.
While a definitive motive has yet to be established, officials continue to connect the targeted killing of the building manager and the subsequent shootings to the long-standing condominium conflict.
