$1 Million Apartment and Deadly Mold: The Full Story Behind the Washington Attack

US reports stated that the gunman who opened fire at a gymnasium in Washington, D.C., was a "wealthy doctor" embroiled in a dispute regarding the presence of "black mold" in his luxury apartment valued at $1.1 million.

The New York Post reported that Dr. Matt Lambert, 55 years old, who worked as an emergency room physician for 20 years, filed a lawsuit in March/April 2025 against the condominium association to which he belonged.

Dr. Lambert claimed in the lawsuit that scaffolding used for repair work in his building located in the upscale Logan Circle neighborhood had caused the spread of dangerous fungus.

According to the newspaper, Lambert opened fire inside a gymnasium on the ground floor of the building where he resided, resulting in the death of residential complex manager James Stewart (46 years old) and injuring four others.

The incident, which occurred approximately one mile from the White House, triggered a massive security response, with dozens of police cars rushing to the scene while helicopters hovered overhead.

The shooting took place during morning rush hour, causing traffic disruptions as police closed surrounding streets and evacuated residents.

Mold and Damage

An account on the platform X named "Of Mice and Mold," reportedly linked to Lambert, displayed a series of complaints about mold and water damage.

The latest post, described as a "statement," was a detailed technical report on the issues present in his apartment.

Jeffrey Carroll, acting chief of Washington police, told reporters: "We know the victim was the building manager. There was an ongoing dispute between the suspect in this case and the building's condominium association regarding maintenance issues and the presence of mold. So we believe it is related to that."

Carroll stated that Lambert also shot four other victims - including two identified men and two women - using a rifle from his balcony on the seventh floor, according to the newspaper.

The four victims were urgently transported to the hospital, with one in critical condition. Carroll noted that it remained unclear whether they were parties to the dispute with Lambert or if he specifically targeted them.

Last Breath

According to a source in federal law enforcement agencies, Lambert barricaded himself inside his luxury apartment - filled with mold - for nearly an hour following the shooting incident, even calling a neighbor to complain before ending his life during a confrontation with police.

The source mentioned that he initially called a neighbor and confessed to firing shots. Police reported that he also broke the gas pipe connected to his heater and started a fire, but the building's sprinkler system activated and controlled the blaze.

Quantities of gasoline were also found inside the upper apartment (penthouse), whose interior walls had been stripped.

When specialized hostage negotiation police officers contacted him, Lambert began directing a torrent of angry criticism against the building's condominium association.

Futile Act

Washington Mayor Muriel Bowser condemned what she described as a "senseless act of gun violence."

The Washington Sun quoted Michael Carney, a member of the Vida Fitness gym, saying he was using the treadmill when he heard a bang and then saw a person on the ground injured by a gunshot to the head.

Carney added to the newspaper that everyone rushed to "hide behind planters and things like that."

The Logan Circle neighborhood is one of the most expensive areas in Washington, known for its high-end restaurants and nightclubs, and is located within walking distance of an area concentrated with foreign embassies.