FBI靠基因家谱破2024年白粉威胁信案：7封信寄自 Dallas，锁定已故男子 William Earl Cade
联邦调查局（FBI）Dallas 办公室11月13日宣布，已经查明2024年从 Dallas 地区寄出多封白粉信的寄信人身份。调查始于2024年2月，当时执法人员发现一封密封信件漏出白色粉末；此后确认共有7封白粉信从 Dallas 地区寄出，信中装有白色粉末并带有暴力威胁，收件人是美国政府高级官员及／或其家人。检测结果显示，这些粉末并无危害。
FBI 表示，笔迹评估认为这些信件很可能出自同一人之手。调查人员用尽了传统的侦查手段仍未能确认身份，随后改用调查基因家谱（Investigative Genetic Genealogy，IGG）技术，最终锁定 William Earl Cade。Cade 已于2026年4月去世。调查人员认为 Cade 是单独作案，目前没有发现其他嫌疑人。
FBI 介绍，自2018年3月开始使用调查基因家谱以来，该局已协助侦破近250起案件，涉及30个州。FBI Dallas 办公室于2020年启动自己的 IGG 项目，设有4支专队，直接与当地执法伙伴合作，协助侦破积案。
FBI Uses Genetic Genealogy to Solve 2024 White Powder Letters Case, Identifying William Earl Cade
The FBI's Dallas Field Office announced on November 13 that it has identified the individual responsible for mailing multiple white powder letters from the Dallas area in 2024. The investigation began in February 2024, when a sealed envelope leaking white powder was discovered. In total, seven white powder letters were mailed from the Dallas area. The letters contained white powder and violent threats and were addressed to high-level U.S. government officials and/or their family members. Testing determined the powder was not hazardous.
A handwriting assessment concluded the letters were likely sent by one person. The FBI said it exhausted all traditional investigative methods to identify the individual and then turned to Investigative Genetic Genealogy (IGG). Through IGG, the FBI identified the perpetrator as William Earl Cade, who had died in April 2026. Investigators believe Cade acted alone and have not identified any additional suspects.
Since its use of Investigative Genetic Genealogy began in March 2018, the FBI has assisted in solving nearly 250 cases across 30 states. The FBI Dallas Field Office launched its IGG program in 2020 and has four dedicated teams working directly with local law enforcement partners to help solve cold cases.
来源：联邦调查局
发布：GSM·美国（发布链接）
图片来源：图：位于华盛顿的联邦调查局（FBI）总部胡佛大楼（ajay_suresh 摄，CC BY 2.0，经 Wikimedia Commons；编辑部四级固定图库 fed-fbi-building，本案由 FBI Dallas 办公室查办，当事人无官方照片）。 / Photo: The FBI headquarters (J. Edgar Hoover Building) in Washington, photographed by ajay_suresh, CC BY 2.0 via Wikimedia Commons (GSM fixed asset library; this case was investigated by the FBI Dallas Field Office; no official photo of the individual is available).
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