What we know about DC gym shooter Dr. Matt Lambert — an ER doc who battled HOA over black mold in $1.1M apartment

A gunman who went on an early morning shooting spree in a fashionable DC neighborhood less than a mile from the White House has been identified. The shooter who killed one person and injured four others in a Logan Circle building has been revealed as Dr. Matt Lambert, an experienced emergency room doctor, who also held a major grudge against his building's Homeowners Association, or HOA, over alleged black mold in his home. The mayhem began shortly before 8 a.m. at Vita Fitness Center in Logan Circle. Located about seven-tenths of a mile from the Executive Mansion. Lambert, who lived on the seventh floor in the same building as the fitness center, opened fire inside the ground floor gym as an estimated 50 gym goers were working out. A little bit after eight we heard shots He was being fired and within seconds there was a man who fell to the ground and a pool of blood came out. One gym member rushed to help him. He was instantly dead. He had been shot in the neck. We were still trying to register what had happened, so we all escaped. We ran outside and within seconds there were gunfires just north of the gym on 15th Street. And then after that the police came. We ran outside and within seconds there were gunfires just north of the gym on 15th Street. And then after that the police came. We ran outside and within seconds there were gunfires just north of the gym on 15th Street. And then after that the police came. We ran outside and within seconds there were gunfires just north of the gym on 15th Street. And then after that the police came. We ran outside and within seconds there were gunfires just north of the gym on 15th Street. We heard gunfire just north of the gym on 15th Street and then after that the police came. After killing the building's manager, James Stewart, in the gym, Lambert then ran back up to his apartment and barricaded himself inside, firing off more shots from his balcony, which injured four other victims. So when the suspect was barricading himself into the building after police came onto the scene, he shot at them when they tried to get in. He tried to set the building on fire. Police said when they went into the building, the fire alarm was going off, sprinklers were raining down on them, they could smell gas. Fortunately, they were able to get that under control. Police said they negotiated with the shooter for nearly an hour to try to coax him out of his pad, up until the doctor committed suicide. Now, police are parsing through shocking potential motives after discovering the wealthy doc's twisted manifesto. In a post on X only minutes before he opened fire, Lambert wrote, My manifesto is an engineering report. Attached to the post was a report which cited, quote, suspected microbial growth, along with water intrusion and a hefty bill to, quote, rehabilitate the wall of his home. Lambert had developed an apparent obsession with alleged leaks, mold, and rodent infestation in his building, ranting about it dozens of times on X in recent months. Northeast corner, notice B. A preponderance of mold closer to the ceiling that grows less as we get to the floor. The ER doc who completed his residency at West Virginia University had even sued his homeowner's association, the Metropole Condominium Association, in March 2025, alleging that repairs to the building, which involved it being surrounded by scaffolding and drapes, led to mold festering in his $1.1 million home. In Lambert's suit, he alleged that his home experienced, quote, no significant water intrusion, mold, moldy smells, moisture accumulation, or related damage. Prior to the remediation efforts overseen by the association, but after the building was enveloped his unit quote experienced suspected water intrusion, mold, significant moisture accumulation, and or related damage. On November 11th, Lambert posted pictures showing renovations in his Logan Circle unit with the caption, two years of living in luxury, and the start of six months with no shower, dryer, HVAC, and cooking. On his personal website, Lambert described himself as a medical tech executive and a, quote, board-certified emergency physician with over two decades of clinical experience. Lambert was also an author and posted a video on X in 2019 promoting his self-published book, Unrest Insured, which is about the health care industry. First step in Medicare for All is to put the public option in the exchanges. They were meant to be there in the original bill. They were lobbied out. If there is a low-cost alternative within the exchanges, you can save that. And that will be the next logical step on our three-and-a-half-decade journey towards a comprehensive health care solution such as Medicare for All. The doc also said he split his time between the, quote, mountains of West Virginia and the Logan Circle neighborhood of Washington, D.C. D.C. police said they were investigating a conflict with the Homeowners Association as the reason behind the shooting.