Doctor kills building manager and injures four in DC shooting before dying

A 55-year-old doctor opened fire inside a gym at an apartment building in Washington DC, killing the 46-year-old building manager and injuring four other people. Police stated that the suspect had been involved in a long-running dispute with building management regarding maintenance issues and mould, and had previously filed a civil case against them. After the initial shooting, the suspect fired at victims from his seventh-floor patio and barricaded himself inside his apartment. He fired at officers on multiple occasions before negotiators heard a gunshot and communication stopped. Authorities later forced entry and found the suspect dead from an apparent self-inflicted gunshot wound, recovering three firearms and containers of flammable liquid from the unit.