On a Thursday morning in Washington's Logan Circle, inside a luxury condominium gym where residents usually come to work out before the day begins, a long-running dispute over mold and neglect ended in violence. A building manager was killed and four others were wounded before the alleged gunman, a resident who had spent months complaining publicly about his home and his building's management, took his own life after a standoff. It is the kind of event that asks a community what it owes to the people who keep its walls standing, and what happens when grievances have nowhere left to go but outw
D.C. Condo Gunman Vented Online About Mold and Disrepair Before Deadly Gym Shooting
Building manager James Stuart, 46, was killed and four others were wounded in the gym shooting.
"My manifesto is an engineering report."
Mark
Why does this story land differently from a typical shooting?
Mimi
Because the target was specific. Police say the attack was aimed at the building's manager, James Stuart, who was 46. And the shooter had been posting about the building for months.
Mark
What was he posting about?
Mimi
Mold, rodents, water damage. An X account called @OfMiceandMold collected dozens of complaints aimed at the contractor, EJF Real Estate Services, and he'd also sued the condo association for more than $290,000.
Luke
Let's be careful with that figure. It's what Lambert alleged as of May, not something a court found. The association and EJF deny causing the damage and say third parties were responsible.
Mark
There was also a post about the gym.
Mimi
On April 28 he wrote, "If you're looking for the building manager, I would check the gym." The shooting happened in the ground-floor gym.
Luke
That's a striking line, but the reporting doesn't say what he meant by it, or whether anyone saw it before Thursday. Police are still assessing motive.
Mark
And the reference to Luigi Mangione?
Mimi
He wrote about "Luigi" tactics, "delay, deny, defend," in an October 1 post about the HOA. Mangione wrote those words on bullets.
Luke
He appeared to invoke it, in CBS's wording. That's an interpretation of a post, not a stated plan. What's confirmed is the shooting, the three firearms recovered, and his death.
Mark
What do neighbors say?
Mimi
One who lives below him says he grew more upset at HOA meetings and used to invite people in to see the damage. Another woman described having to flee past the victim.
Der Puls
- A quiet gym in a luxury condo became a scene of gunfire, leaving one man dead and four wounded.
- For months, a resident's online posts about mold, rodents and water damage grew sharper, and then darker.
- A lawsuit seeking more than $290,000 was meant to settle the dispute, but the association and contractor deny responsibility.
- Police are still working to establish motive, while shaken residents absorb what happened just below their own apartments.
On a Thursday morning in Washington's Logan Circle, inside a luxury condominium gym where residents usually come to work out before the day begins, a long-running dispute over mold and neglect ended in violence. A building manager was killed and four others were wounded before the alleged gunman, a resident who had spent months complaining publicly about his home and his building's management, took his own life after a standoff. It is the kind of event that asks a community what it owes to the people who keep its walls standing, and what happens when grievances have nowhere left to go but outward.
On Thursday morning, gunfire broke through the ordinary rhythm of the Vida Fitness center on the ground floor of the Metropole Condominiums in Logan Circle. One man was killed and four others were wounded. The dead man was James Stuart, 46, the building's manager. Police said the attack targeted him.
The gunman, Dr. Matt Lambert, 55, lived in the building. After a standoff, police said, he died by suicide in his apartment, where three firearms were recovered. For months before the attack, Lambert had been speaking loudly in public. Through an X account linked to him, he documented complaints about mold, rodents and disrepair, directing his frustration at the building's contractor, EJF Real Estate Services. Some posts were ominous, including one that said, "If you're looking for the building manager, I would check the gym."
The dispute had also reached court, where Lambert claimed more than $290,000 in damages. The association and EJF deny causing the harm, saying it came from third parties and that Lambert had failed to limit his own losses.
Witnesses described the chaos: a woman on a treadmill who had to pass the scene to escape, and a neighbor who lived beneath Lambert and remembered him as increasingly angry at HOA meetings. He called the 99-unit building a tight-knit community, now shaken, with his girlfriend barricaded inside their apartment during the standoff.
Police are still assessing the motive. The neighborhood, known for its historic architecture and busy restaurants, is left to reckon with what happened downstairs.
On Thursday morning, inside the Vida Fitness center on the ground floor of the Metropole Condominiums in Washington's Logan Circle neighborhood, a gunman opened fire. One person was killed and four others were wounded. Police identified the dead man as James Stuart, 46, the manager of the building.
The shooter was identified as Dr. Matt Lambert, 55, a resident of the building. Police said he shot and killed himself in his apartment after a standoff. Law enforcement sources in Washington told CBS News that three firearms were recovered from the unit. Police said the attack targeted the building's manager.
Before the shooting, Lambert had been airing grievances in public. An X account under the name @OfMiceandMold, which is associated with him, became a running record of complaints about mold, rodents and disrepair in his unit. In dozens of posts he aimed his frustration at the building's contractor, EJF Real Estate Services, alleging it had failed to deal with the problems. He also posted what he described as an engineering report on the mold and water issues, and wrote: "My manifesto is an engineering report."
Some posts pointed toward something darker. On Oct. 1, he wrote that after months of what he called "Luigi" tactics by the HOA, "delay, deny, defend," he and others had finally been able to submit an independent engineering report into the record. He said he would share it on X "when the time is right." The phrase echoes the words Luigi Mangione wrote on the bullets used to kill UnitedHealthcare CEO Brian Thompson in 2024. In a post dated April 28, Lambert wrote: "If you're looking for the building manager, I would check the gym."
The dispute had also moved into court. Lambert sued the Metropole Condominium Association, listing his grievances and alleging damages of more than $290,000 as of May. The association and EJF denied causing the damage. They said any damage came from third parties beyond their control and that Lambert had failed to limit his own losses. CBS News has reached out to EJF for comment, and neither party immediately responded to requests.
D.C. tax records show Lambert bought the condo in September 2016 for $1,095,000, and court documents show he owned a penthouse unit. According to his LinkedIn profile, he founded and led MLEM, a healthcare and technology consultancy, after earning his undergraduate and medical degrees at Marshall University in West Virginia and completing his residency at West Virginia University.
A woman who was on a treadmill when the shots rang out said she had no way to leave the gym except past the scene where one victim had been killed. "It was like chaos," she said. "It was horrific, honestly." A man who was about 20 feet from the shooting told CBS News he lived directly below Lambert. He described a neighbor who grew increasingly upset at HOA meetings and who used to invite people into his apartment to show how bad conditions were. The witness called the 99-unit building a "tight-knit community." During the standoff, he said, his girlfriend barricaded herself in their apartment, which is now under an inch of water from the response to a fire at the scene.
Police are still assessing the motive. The association and EJF maintain they were not responsible for the damage, and residents of the building, in a neighborhood known for historic architecture and some of the city's busiest restaurants and bars, are left to absorb what happened downstairs.
Bemerkenswerte Zitate
If you're looking for the building manager, I would check the gym.— Matt Lambert, X post dated April 28
There was no way of getting out of the gym other than going past that scene.— Woman who was on a treadmill in the gym
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