Police have identified the gunman in Thursday’s early-morning gym shooting in Washington, DC, as Dr. Matt Lambert, an emergency room physician who had been locked in a legal fight with his condo association over black mold in his $1.1 million apartment.
Lambert opened fire inside the ground-floor gym at 1515 15th St. NW in the Logan Circle neighborhood, killing at least one person and injuring four others. He then fled back up to his seventh-floor unit, barricaded himself inside for nearly an hour, and killed himself.
DC police say they are investigating a conflict between Lambert and his homeowners’ association as the motive behind the shooting.
Lambert sued the Metropole Condominium Association in March 2025. His suit claimed that renovation work on the building, which required scaffolding and drapes to cover it, caused mold to spread through his unit. Before that work began, the suit states, his home had experienced “no significant water intrusion, mold, moldy smells, moisture accumulation, or related damage.” After the remediation work started, he alleged his unit “experienced suspected water intrusion, mold, significant moisture accumulation, and/or related damage.”
Lambert aired his frustration publicly as recently as this week. An X account linked to him posted Wednesday, alongside photos of the renovation work in his unit: “Two years of living in luxury (and the start of 6 months with no shower, dryer, HVAC, and cooking).”
Lambert described himself online as “a board-certified emergency physician with over two decades of clinical experience” who also worked as a medical technology executive. His personal website said he had “a deep understanding of healthcare regulations and their impact on technology adoption,” and that he split his time between “the mountains of West Virginia and the Logan Circle neighborhood of Washington, DC.”
Ward 2 Council Member Brooke Pinto, who represents and lives in the neighborhood, told NBC News that preliminary information suggests Lambert was targeting someone specific inside Vida Fitness and that he “had been in active litigation with over a condo issue.”
“It’s just so sad and so senseless to kill someone over a dispute that should be worked out reasonably,” Pinto said.
At least one person is dead and four others were wounded in the attack. Police have not released further details on the victims or on the specific grievance that Lambert held against anyone inside the gym.
