What Police Found in Dr. Matt Lambert's D.C. Apartment After the Shooting – And the Unsettling Call He Made to the Building Concierge

A bitter dispute over alleged property damage had already pushed tensions to a breaking point. But as the deadly violence unfolded, chilling details began emerging that raised an even more disturbing question: Had the tragedy been foreshadowed months before it happened?

What began as a deadly shooting inside a Washington, D.C., luxury condominium complex has taken an increasingly disturbing turn. As investigators pieced together the suspect's actions, evidence inside his apartment, a deeply personal anniversary, and accounts of phone calls began painting a troubling picture of what unfolded.

The shooting on Thursday, November 12, 2026, left one person dead and four others injured at a gym near Logan Circle in Washington, D.C., sending shock waves through a residential community.

According to NBC News' live coverage, one of the four injured victims was in critical condition following the attack. The suspected gunman was identified as Dr. Matt Lambert, 55, a physician and healthcare consultant who lived in the condominium building where the violence erupted.

Federal law enforcement sources confirmed that Lambert is dead. Police said officers had spoken with him by phone before discovering him inside his apartment with what appeared to be a self-inflicted gunshot wound.

But as authorities investigated the shooting, disturbing details began emerging about Lambert's relationship with the building's management and the circumstances leading up to the tragedy. And some of those details appeared to point toward a dispute that had been escalating long before Thursday's violence.

A Deadly Shooting at a Luxury D.C. Building

The shooting occurred at Vida Fitness, a gym on the ground floor of the Metropole condominium complex, which serves residents of the building. Police identified the man killed in the attack as 46-year-old James Stuart, the building's manager. The tragedy unfolded in Logan Circle, a Washington neighborhood known for its historic architecture, popular restaurants, and vibrant nightlife.

For residents of the upscale condominium complex, however, Thursday morning brought scenes of terror that few could have imagined. One woman told CBS News she had been exercising on a treadmill when she heard gunshots. As she attempted to escape, she found herself confronting a horrifying scene. "There was no way of getting out of the gym other than going past that scene," she recalled.

"It was like chaos. It was horrific, honestly." Another resident, who was approximately 20 feet away from the shooting, described the building as a "tight-knit community" of 99 condominium units. He told reporters that his girlfriend had barricaded herself inside their apartment during the shooting and subsequent police standoff.

The situation reportedly became even more distressing when water from the emergency response to a fire at the scene left approximately an inch of water inside the residence. As residents struggled to process the violence, investigators began examining what might have driven Lambert to allegedly target the building's manager.

What emerged was a contentious history involving property damage allegations, legal proceedings, and increasingly pointed online complaints.

The Bitter Apartment Dispute That Preceded the Shooting

According to a November 12 report by CBS News, Lambert had been embroiled in an ongoing disagreement over alleged mold and water damage inside his luxury apartment. The physician owned a penthouse unit at the Metropole Condominiums, which he purchased in September 2016 for $1,095,000, according to Washington, D.C., tax records.

Court documents showed that Lambert had filed a lawsuit against the Metropole Condominium Association over alleged problems with the property. By May, he was claiming damages exceeding $290,000. His complaints centered on what he described as failures by the building's contractors and management company, EJF Real Estate Services, to resolve persistent water and mold issues.

The Metropole Condominium Association and EJF disputed responsibility for the damage. They maintained that any damage had been caused by third parties outside their control and argued that Lambert had failed to limit his losses. Neither organization immediately responded to CBS News' requests for comment following the shooting.

Meanwhile, Lambert's frustrations had reportedly extended beyond legal filings and condominium association meetings. A resident who lived directly beneath Lambert told CBS News that the physician had become increasingly upset during homeowners association (HOA) meetings.

The witness also claimed Lambert had previously invited people into his apartment to show them the extent of the alleged problems. Yet the legal dispute was not the only place where Lambert had documented his grievances. An online account connected to the physician contained messages that would take on a particularly disturbing significance after the shooting.

The 'OfMiceandMold' Account and Its Troubling Posts

An X account operating under the name @OfMiceandMold reportedly served as a public record of Lambert's complaints about the condominium building. Dozens of posts detailed allegations involving mold, water damage, contractors, and management's handling of the situation. But some of the messages went beyond ordinary complaints about property maintenance.

Before Thursday's attack, the account shared what Lambert claimed was an engineering report examining the alleged damage. One accompanying message declared: "My manifesto is an engineering report." Another post, dated October 1, appeared to reference Luigi Mangione, who was accused of fatally shooting UnitedHealthcare CEO Brian Thompson in December 2024.

Lambert wrote:

"After months of 'Luigi' tactics (delay, deny, defend) by the HOA, we were finally able to submit an independent engineering report into the record."

He also suggested he would publish the engineering report on X "when the time is right." The phrase "delay, deny, defend" was particularly notable because the words were associated with the ammunition Mangione used in Thompson's killing. However, the existence of these posts does not independently establish Lambert's intentions or prove that he was planning a violent attack at the time they were written.

An even more unsettling detail emerged from a separate social media post dated April 28. "If you're looking for the building manager, I would check the gym," the message read. Months later, police said the shooting had occurred inside the building's fitness center, killing the man who managed the property.

The apparent overlap between the earlier message and the eventual location of the attack raises questions about whether the building manager had been a focus of Lambert's anger well before the violence. However, authorities have not established that the April post was an explicit threat or confirmed precisely what Lambert intended when he wrote it.

Nevertheless, the messages have become part of the troubling history surrounding the case. And the subsequent police investigation uncovered another significant detail.

What Police Found Inside Lambert's Apartment

Following the shooting, Metropolitan Police searched Lambert's apartment and recovered three firearms. The discovery included a handgun, a rifle, and a shotgun. Early reports indicated that the handgun was believed to have been used during the attack. However, investigators later revealed that the other weapons also played a role.

Metropolitan Police interim Chief Jeff Carroll confirmed that authorities had connected all three firearms to the incident. "We know that he used each of those firearms, so it does appear there was some level of planning associated with this," Carroll stated.

The police chief also provided a more detailed account of where the weapons were reportedly discharged. According to Carroll, Lambert used a handgun inside the gym, while a rifle was fired from the apartment's patio balcony.

The shotgun, meanwhile, was used "at the end of the incident," the chief said. The discovery added a new dimension to the investigation, particularly because the firearms had been recovered from the suspected shooter's own residence. And police revealed another important detail about the weapons. "We do know that the suspect did not have any firearms registered to him in Washington, D.C.," Carroll confirmed.

Authorities said it remained unclear how Lambert had obtained the weapons, and investigators were examining whether the guns had been legally purchased. Importantly, the absence of firearms registered in Lambert's name in Washington, D.C., did not by itself establish that the weapons had been illegally acquired.

Nevertheless, the combination of three firearms, their reported use at different points during the incident, and the earlier history of complaints led police to consider the possibility of advanced planning. As investigators worked to establish the full sequence of events, another revelation emerged from someone who had known Lambert in a very different setting. And it concerned the significance of the very day on which the shooting occurred.

The Heartbreaking Significance of November 12

Attorney Joel Braithwaite, who previously represented Lambert in litigation against his condominium association, spoke publicly after the shooting. During a Thursday evening news conference, the attorney revealed a deeply personal detail about the date.

According to CNN's report on Braithwaite's remarks, November 12 marked the anniversary of Lambert burying his mother. "The one thing that I did learn is that, unfortunately, today is the anniversary of him burying his mother," Braithwaite shared. The attorney acknowledged that he could not explain whether the anniversary had any connection to Lambert's actions.

He said he did not know how the various circumstances might have come together, but emphasized that violence was never an acceptable response to litigation or personal grievances. The revelation added a heartbreaking layer to an already devastating incident.

However, authorities have not established whether the anniversary influenced Lambert's behavior or played any role in the shooting. Still, what made Braithwaite's account even more striking was his description of Lambert in the days before the attack.

The attorney said he had spoken with the physician within the previous 24 to 48 hours and had even conducted depositions in the legal matter the week before. According to Braithwaite, Lambert had seemed optimistic about his future. He described the physician as being in "great spirits" and said Lambert had spoken about new opportunities ahead.

Lambert was reportedly expecting to begin a new job the following Monday. The attorney said the position was expected to be highly compensated and would come with considerable professional recognition. These conversations made Thursday's events especially difficult for Braithwaite to comprehend. "I'm at a loss," he admitted.

He described Lambert as a "humanitarian" and "a great thinker," as well as someone who appeared calm and collected. Braithwaite also reflected on the contradiction between the professional he believed he knew and the person accused of carrying out the shooting.

"I can't tell you how surprised I am because the person that I knew as a client, Dr. Matt Lambert was an emergency room physician, someone that was in the business of healing people and helping them," he said. Lambert's professional background appeared to reinforce that contrast.

According to his LinkedIn profile, he was the founder and CEO of MLEM, a Washington-based healthcare and technology consultancy. He had obtained his undergraduate and medical degrees from Marshall University in West Virginia and completed his residency at West Virginia University.

To those who knew him through his professional work, the accusations represented a shocking departure from the career he had built. Yet another account from Thursday's events suggested that Lambert had attempted to communicate his reasoning while the emergency was still unfolding.

And this time, the reported remarks came from people connected directly to the building where the shooting occurred.

The Unsettling Phone Call to the Building's Concierge

As residents evacuated the Metropole during the emergency, Lambert reportedly made telephone calls in which he discussed his actions. Two witnesses later recounted details of those conversations to CNN. One of them, Sean McClafferty, lived in the Metropole and said he was standing approximately one block away from the building with its concierge after the evacuation.

While they were together, the concierge reportedly received a telephone call from Lambert. What McClafferty said he heard was particularly disturbing in light of the violence that had just occurred. According to CNN's account of the witnesses' statements, McClafferty described the message Lambert allegedly conveyed during the call.

"Essentially, he told our concierge, 'This is what I need to do to get attention,'" McClafferty recalled. The statement suggested that Lambert was attempting to communicate a message about his actions, although the precise meaning of his reported words remains uncertain. And McClafferty was not the only person to describe a concerning telephone conversation.

A second witness, who requested anonymity, told CNN that he had also heard Lambert speaking on the phone. According to that witness, Lambert said the shooting was how he had decided to resolve his dispute with the building's board.

The two accounts offered a disturbing possible connection between the longstanding condominium dispute and Thursday's deadly violence. They also provided important context for investigators attempting to determine what led to the attack.

Still, both accounts remain witness recollections, and police have not publicly established a complete motive based on those statements alone.

A Tragic End to a Long-Running Dispute

In the aftermath of the shooting, Vida Fitness announced that its location would remain closed until further notice. Residents were left grappling with the death of Stuart, the injuries suffered by four other people, and the frightening experience of an armed attack inside their own building.

For investigators, the case presents several troubling elements: a bitter property dispute, an online history of escalating complaints, multiple firearms, and witness accounts of telephone conversations during the emergency. The anniversary of Lambert's mother's burial added another deeply personal detail, although its relevance to the events remains unknown.

The reported phone call, however, remains one of the most unsettling revelations. After months of complaints, lawsuits, and public accusations involving the building's management, the physician allegedly described the violence as a way to get attention and resolve his dispute.

As police continue investigating the circumstances of the shooting, the unanswered questions extend far beyond the weapons recovered from his apartment. What remains undeniable is the human cost: one life lost, four people injured, and a residential community forever changed by a dispute that ended in tragedy.

At this time, we wish to extend our most heartfelt condolences to Stuart's family and loved ones, all the residents and lives affected by this tragedy, and the entire community.

If you or someone you know is considering suicide, please contact the National Suicide Prevention Lifeline at 1-800-273-TALK (8255), text "help" to the Crisis Text Line at 741-741, or go to suicidepreventionlifeline.org.