Edward Marchesi Just before 8 a.m. Thursday morning, an episode of gun violence rocked a Washington, D.C., neighborhood. A man, identified as Matt Lambert , 55, opened fire inside a small gym located on the ground floor of an apartment building, instantly killing the facility's manager, James Stuart , 46, and wounding four other people.
After the initial attack, the attacker took refuge in his seventh-floor apartment, from where he continued shooting at passersby from the balcony.
The attack and its immediate consequences
According to authorities, the sequence of events began with a gunshot that directly hit Stuart. The building manager had previously been involved in a lengthy argument with Lambert regarding the condition of the apartment, but no criminal charges were filed.
From the balcony, Lambert fired a rifle, wounding four individuals; one victim remained in critical condition, while the other three suffered non-life-threatening injuries. Rescuers also had to contend with a fire started by the perpetrator, who fired at officers in the hallway.
The response of the police
The Metropolitan Police , led by acting Chief J.W. Carroll , cordoned off the building with tactical teams and positioned snipers on the rooftops to ensure the safety of passersby. Numerous emergency vehicles blocked the streets, turning the neighborhood into a safety zone. Shopkeepers and residents watched helplessly as the conflict unfolded, describing the sound of gunfire and the speed with which the scene transformed into a full-blown urban warfare.
The Roots of the Conflict: A Condominium Dispute
The motive behind the violence appears to be linked to a legal dispute that began in 2025. Lambert, a doctor by profession, had filed a lawsuit against the condominium association, claiming that water leaks and mold had made the apartment uninhabitable. In legal documents, Lambert stated that he had spent approximately $300.000 on remediation. The association, for its part, denied the allegations and filed a countersuit against the gym on the first floor, alleging that commercial dryers were the cause of the moisture problems.
At the time of the shooting, the dispute was still pending in court, without a final ruling. Police Chief Carroll said, "We believe it's related to this ," referring directly to the condominium issue.
Posthumous discovery and conclusions of the investigation
After the confrontation ended, officers entered Lambert's apartment and found him dead from a self-inflicted gunshot wound. Inside, they found three rifles and a stash of gasoline, confirming the attacker's intent to prolong the attack. No evidence of third-party involvement in the planning of the attack was found.
The incident plunged the entire neighborhood into mourning, with residents organizing a vigil to honor James Stuart's memory and support the families of those injured. Authorities promised to review safety protocols in apartment buildings with adjacent commercial spaces to prevent similar tragedies in the future.