Social media account linked to D.C. shooter complained of disrepair, invoked man who killed healthcare CEO

Police said the gunman, identified as Dr. Matt Lambert, 55, continued firing into the street and then shot and killed himself in his apartment after a standoff.

Three firearms were recovered from his apartment, according to law enforcement sources in Washington.

An account on X under the name @OfMiceandMold has served as a repository for complaints about the alleged disrepair of the apartment where Lambert lived.

In dozens of X posts, he vented his frustration with the Metropole Condominiums' building contractors, EJF Real Estate Services, and his allegations they failed to address problems with his unit.