Doctor Kills Gymgoer, Then Himself in Washington Shooting

A man was killed and four people were wounded when Dr. Matt Lambert opened fire inside a gym in the Logan Circle neighborhood of Washington, DC, on November 12. One of the wounded was in critical condition, police said; the others had injuries that were not considered life-threatening.

Police said Lambert went to an apartment in the building after the shooting and barricaded himself there. Negotiators spoke with him for about an hour. Officers entered after hearing a gunshot and found him with a self-inflicted wound.

Lambert, 55, was an emergency physician and medical technology executive. He had sued the building’s condominium association in March 2025, claiming renovation work led to water intrusion, moisture and mold in his apartment. The association oversees the residential tower where the gym is located.

Lambert had also posted online about the dispute. In a post made while police were responding, he called a document an engineering report and shared material that appeared to support his claims about building problems.

Police Chief Jeffery Carroll said investigators were examining a conflict between Lambert and the homeowners’ association. Ward 2 Council Member Brooke Pinto said preliminary information indicated Lambert may have targeted someone at the gym and was involved in active litigation over a condominium matter. She called the killing senseless and said the dispute should have been resolved reasonably.