白宫外枪击案嫌疑人身份确认：精神健康监管漏洞暴露，无系统性交易机会

核心事实剥离

• 事件本质：白宫外枪击案嫌疑人Nasire Best（21岁）被击毙，调查揭示其2025年7月曾因试图闯入白宫被特勤局逮捕并强制送精神科治疗，精神健康监管漏洞成为调查焦点。〔SRC:"The suspect had already been arrested by the US Secret Service in July 2025 after he tried to gain entry to the White House, and he was sent to a psychiatric ward for mental health issues in