Doctor identified as DC gym mass shooter

A 55-year-old gunman killed one person and wounded four others in Washington, D.C.’s Logan Circle neighborhood. Police identified the suspect as Matt Lambert, an emergency room doctor, who allegedly shot and killed his building manager inside a gym before firing a rifle at four people from his seventh-floor apartment balcony. One victim remains in critical condition. Lambert later died from a self-inflicted gunshot wound after barricading himself inside his apartment. Authorities say he had been involved in a legal dispute with building management over a mold problem in his unit.