A Washington, DC, emergency room doctor opened fire in a ground-floor gym Thursday morning, killing one person and injuring four others before barricading himself and dying.
Dr. Matt Lambert, 45, had been locked in a lawsuit with the Metropole Condominium Association since March 2025, accusing the board of allowing black mold to proliferate after building repairs. The shooting is linked to the ongoing dispute with the homeowner's association, and the victim was reportedly someone Lambert had targeted. After the attack, Lambert retreated to his seventh-floor apartment, held occupants hostage for about an hour, and later killed himself. Councilmember Brooke Pinto called the incident "sad and senseless," noting the fatal outcome stemmed from a property disagreement that should have been resolved legally. Authorities continue to investigate the motive and any possible connection to the mold remediation controversy.