The gunman who opened fire at a Washington, D.C., gym Thursday morning, killing one person and wounding four others before dying from an apparent self-inflicted gunshot wound, has been identified by multiple media outlets as Dr. Matt Lambert.
Lambert reportedly lived in a $1.1 million condominium located directly above the VIDA Fitness gym in the city’s Logan Circle neighborhood, where the shooting took place. After the attack, he barricaded himself inside his seventh-floor apartment. Police later found him dead inside the unit.
Investigators are examining whether a long-running dispute between Lambert and his homeowners association over black mold in his unit may have been connected to the shooting. Officials have not announced an official motive, and the investigation is ongoing.
According to court records, Lambert filed a lawsuit against the Metropole Condominium Association in March 2025. In the suit, he alleged that repairs made to the building caused water damage and black mold in his apartment, which he said had become uninhabitable as a result.
The day before the shooting, Lambert posted on what is believed to be his X account about conditions in his home, writing: “Two years of living in luxury (and the start of 6 months with no shower, dryer, HVAC, and cooking).” The post included photos appearing to show the apartment in a state of disrepair.
This is a developing story, and authorities have not confirmed a final motive for the shooting.
