DC doctor kills building manager, three others in apartment complex shooting

Summarised from 6 outlets · 14 reports · Updated 13 Nov, 23:09 · Archive

Dr Matt Lambert, 55, shot dead building manager James Stuart in a gym at his luxury Washington DC apartment complex and wounded four others before killing himself.

Dr Matt Lambert, 55, a medical technology executive based in Washington DC, opened fire inside Vida Fitness gym in the Logan Circle neighbourhood on Thursday morning at approximately 8am. He fatally shot James Stuart, 46, the building manager, in the back, and then fled to his seventh-floor penthouse apartment in the same building at 1515 15th Street. From his private balcony, he fired a rifle at people below, wounding four others, including construction workers at a nearby job site and other individuals in the area. One woman sustained a gunshot wound to the head and was rushed to George Washington University Hospital. Other victims were treated at Howard University Hospital with non-life-threatening injuries. Police said Lambert fired twice at officers positioned outside his apartment door during a standoff that lasted nearly an hour. He also broke a gas line in his fireplace and set a fire, which the building's sprinkler system extinguished. He ultimately took his own life.

Lambert had been engaged in a bitter dispute with Metropole Condominium Association, which operates the luxury residential tower, over water damage and mould in his penthouse unit. He had filed a lawsuit against the association and claimed that renovations to the building's facade in 2023 had caused water intrusion and resulting mould, rendering his apartment unlivable. He purchased the one-bedroom penthouse in September 2016 for approximately $1.095 million.

For over a year, Lambert maintained an X account under the username 'OfMiceandMold', where he documented alleged problems in the building through dozens of posts, photos and videos. He complained about mould, water damage, rodent infestation and unfinished renovation work. According to the Independent, Lambert spent approximately $300,000 of his retirement savings fighting the legal battle. The New York Post reports that Lambert had told a neighbour months before the shooting, 'If you want to see the building manager, he comes in the gym about 8 o'clock', suggesting he knew where to find Stuart before carrying out the attack.

Minutes before the shooting, at 8.06am, Lambert posted what he described as his 'manifesto' to his X account: 'My manifesto is an engineering report.' He attached screenshots from a report by CED Technologies that supported his claims about water damage and mould in the building, along with what appeared to be records of reported building issues. An X account associated with Lambert also referenced 'Luigi' tactics in October, an apparent reference to Luigi Mangione, who killed UnitedHealthcare CEO Brian Thompson in 2024.

After the shooting, building manager Charelle Ferguson, who works for Metropole Condominiums, recounted a phone conversation with Lambert at around 9am. She said he told her he was tired of the mould and water damage in his unit and that 'the only way people will pay attention, you have to do something'. He then confessed to shooting five people, including her colleague Stuart.

Lambert's attorney, Joel Braithewaite, told reporters Thursday evening that Lambert had appeared to be 'doing very well' and was scheduled to start a new job on Monday. Braithewaite said Lambert had performed 'exceptionally well' giving a presentation on artificial intelligence in Orlando just two days before the shooting. He expressed shock at what had transpired, saying there was nothing to suggest Lambert owned firearms. Three firearms were recovered from his apartment, according to law enforcement sources. The investigation remains ongoing.

How it is being reported

• Mom seriously injured in DC shooting was walking dog when gym gunman Matt Lambert attackedSusan Hamerski is recovering after being shot while walking a dog during Dr. Matt Lambert's DC rampage, which killed building manager James Stuart.New York Post · 14 Nov, 13:33
• DC gym shooter gave ominous quote on mold issues months before he opened fire that left one dead and four hurtDr. Matt Lambert gave an ominous quote to a reporter months before the shootingIndependent World · 13 Nov, 17:00
• DC gym shooter Dr Matt Lambert vented about state of his condo for 14 months in online manifestoThe well-heeled Washington, DC doctor who killed his condo manager in the building’s gym vented online about the state of his condo for 14 months — before exploding this week with the crazed mass shooting that also saw four others hit. Dr. Matt Lambert, 55, started a dedicated X account, “Of Mice and Mold,” in...New York Post · 13 Nov, 16:30
• What we know about the 4 additional victims shot by deranged DC doctor Matt LambertThe crazed killer went out on his private patio off his seventh-floor penthouse and began wildly shooting at people below, authorities said.New York Post · 13 Nov, 05:50
• Deranged doctor made eerie confession after killing building manager at luxury DC apartment complex in rampage over mold and mice that left four others injuredDr Matt Lambert, 55, fatally shot James Stuart, 46, in the back inside the Vida Fitness in Logan Circle at around 8am on Thursday.Daily Mail · 13 Nov, 00:37
• DC gunman was doing ‘very well’ before shooting — and planned to start a new job next week, attorney saysLambert shot and killed building manager James Stuart, 46, in the luxury condo’s gym Thursday morning before wounding four others — including one who remains in critical condition.New York Post · 13 Nov, 00:04
• DC gunman made eerie comment about victim’s routine before shooting — and invoked slogan inscribed on Luigi Mangione’s bulletsLambert used a handgun to kill Stuart just after 8 a.m. inside the building’s ground-floor gym in the ritzy Logan Square neighborhood.New York Post · 12 Nov, 22:39
• Victim in DC shooting ID’d as building manager that Matt Lambert had a beef with over moldy $1.1M penthouseThe victim shot dead by a well-heeled doctor in a Washington, DC gym was the manager of the shooter’s building — who’s believed to have been feuding with him over black mold in his $1.1 million penthouse, cops said Thursday. James Stewart, 46, was killed when Dr. Matt Lambert, 55, opened fire inside Vida Fitness...New York Post · 12 Nov, 21:26
• D.C. gunman appeared to vent about problems with luxury condoAn X account associated with D.C. shooting suspect Matt Lambert was filled with complaints about mold, rodents and disrepair in his unit in the condo building.CBS News · 12 Nov, 20:42
• Inside intense hour-long standoff between DC shooter Matt Lambert and cops before killing himself in mold-ridden penthouseThe wealthy doctor who opened fire inside a Washington, DC, gym barricaded himself in his mold-filled penthouse for nearly an hour — and called a neighbor to gripe — before ultimately killing himself in a standoff with cops, according to a federal law enforcement source.New York Post · 12 Nov, 20:36
• Matt Lambert, DC doctor, identified as gunman in deadly attack after HOA feudDr. Matt Lambert allegedly posted a manifesto referencing an engineering report minutes before the deadly VIDA gym shooting in Logan Circle.Fox News · 12 Nov, 19:44
• Matt Lambert posted twisted ‘manifesto’ just minutes before deadly DC shooting in trendy Logan CircleDr. Matt Lambert, the gunman in the Washington, DC, gym shooting, posted a twisted “manifesto” on X shortly before opening fire Thursday morning.New York Post · 12 Nov, 19:05
• Washington DC shooting live: Dr Matt Lambert named as suspect with two dead including gunmanA gunman has taken his own life in Washington DC after shooting five people close to the White House, killing at least one and leaving another in critical conditionThe Mirror · 12 Nov, 18:21
• Wealthy medical CEO named as gunman who murdered one at gym of his luxury apartment building before taking his own life: Raged about mice and mold online moments before opening fireDr Matt Lambert, 55, shot dead one man in the gym of the building in Washington DC and wounded three others before turning the gun on himself.Daily Mail · 12 Nov, 17:44

In this story: Dr Matt Lambert · James Stuart · Metropole Condominium Association · Washington DC · Logan Circle · Vida Fitness · EJF Real Estate Services

This summary was written by AI from the headlines and standfirsts above, and states as fact only what at least two outlets report. How we use AI · Report a problem · Corrections log