Doctor Behind Mass Shooting in D.C., Police Say

 

Police named emergency physician Matt Lambert, MD, as the gunman in Thursday's mass shooting in Washington, D.C.

According to police, Lambert fatally shot a man at a gym and left another in critical condition before fleeing and shooting others. He then killed himself after barricading himself in an apartment.

Lambert described himself on his website as a clinician and entrepreneur.

An X account that appears to be associated with Lambert posted a manifesto on Thursday morning, which included a screenshot of a document with Lambert's name on it.

"My manifesto is an engineering report," the post stated. Police had said earlier in the day their suspect apparently had a dispute with the building's homeowners association.

The X account, OfMiceandMold, hosts dozens of images and complaints about problems with the condo and building. Lambert's name is mentioned several times in documents or screenshots of documents, including a lawsuit in which Lambert is the plaintiff.

The address on Lambert's website is on 15th Street, where the shooting occurred.

The shootings occurred around 8 a.m. in Logan Circle, about a mile north of the White House. Much of the block on 15th Street Northwest was cordoned off as police urged people to avoid the area, which includes a VIDA fitness center, St. Luke's Episcopal Church, residences, and a Whole Foods supermarket. Schools were locked down.

Law enforcement SWAT teams and other officers had their guns drawn on the roof of an apartment building and on the ground below.

Witness James Spellman, who was at the gym, said there were about 50 people there around 8 a.m. when the shooting began.

"Within seconds there was a man who fell to the ground, and a pool of blood came out," he said. "One gym member rushed to help him. He was instantly dead. He had been shot in the neck."

Spellman said he and others dashed out of the gym. He said he heard about two shots fired in the gym and about five or six fired outside.

Officials believe Lambert shot another person in a parking garage elevator, and then barricaded himself on the seventh floor of the building, the official said.

Another witness, Ryan Dubicki, said he was in his nearby apartment around the same time when he "heard about five bangs."

"They were really spread out so I thought it was construction," he said. A short time later, "there were cops everywhere."

The Logan Circle neighborhood has seen violence before. In early August 2025, a onetime member of President Donald Trump's Department of Government Efficiency was assaulted early on a Sunday morning in the neighborhood by a group of teenagers attempting to carjack him and a woman, authorities said.

Days later, Trump fulfilled his threat to bypass local authority and imposed direct federal control over the city, sending in hundreds of National Guard members to reduce crime. That deployment continues today.

https://www.medpagetoday.com/emergencymedicine/emergencymedicine/123858