Explainer

Why did a gunman open fire at a Washington gym?

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It began at a busy gym in Washington, about a mile from the White House, during morning workouts.

Washington

Washington

The gunman shot 5 people, one fatally. The man killed was James Stuart, 46, a building manager.

5

people shot, one fatallySource: Washington Post · 12.11.2026

Anthony Mirones, who was in the cardio area, recalled: The people in cardio had to step over the body.

“The people in cardio had to step over the body”

Anthony Mirones

Officials speaking anonymously identified the gunman as Matt Lambert, 55, a doctor. He bought his condo in 2016. Court records show he said mold appeared around 2024, and he sued the condo association in 2025. Police say early investigation points to a possible motive, a conflict with that association, which investigators are still pursuing.

Dispute under review
  1. 2016Bought condo
  2. 2024Mold claimed
  3. 2025Sued condo association

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The story

Gunman kills man at Washington gym, shoots four more and dies in apartment standoffRead the article

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