DC gym shooter Matt Lambert vented about state of penthouse for 14 months in online manifesto before crazed attack

Fuente: New York Post

The 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 September 2025 to rant about problems with the Logan Circle apartment he bought in 2016 for $1.