2026年5月12日 / 美国东部时间早上6:00 / 哥伦比亚广播公司新闻
对于一个家庭来说，失踪亲人下落不明的一百天是无比煎熬的漫长时光。对于负责此案的调查人员而言，这段时间也足够让他们身心俱疲。
在失踪案发生满一百天之际，南希·格思里失踪案的调查可能取决于一缕DNA。目前弗吉尼亚州匡蒂科联邦调查局实验室的科学家正在对这缕DNA进行检测，以期锁定绑架者身份。
格思里是《今日秀》联合主播萨凡纳·格思里的母亲，她于2月1日被报失踪。
从亚利桑那州图森市格思里家中提取到的DNA最初由皮马县警长办公室侦探送往佛罗里达州的一家私人实验室进行分析。数周后，这份DNA被送往联邦调查局位于匡蒂科的顶尖犯罪实验室。据执法部门消息人士向哥伦比亚广播公司新闻透露，目前检测工作仍在进行中。
调查人员尚未公开确认该样本的细节以及确切发现地点。
“如果在房屋内某处找到带有DNA的物品，比如一缕头发，那是一回事；但如果在受害者最后已知的活动地点附近，比如她的床上，发现头发，则会是联邦调查局的高度优先调查事项，”前联邦调查局亚利桑那州主管特别探员兰斯·莱辛说道。
退休的联邦调查局主管特别探员杰森·帕克表示，DNA分析的艰苦过程，包括构建家族谱系、进行法医比对和排除工作，“远比犯罪题材电视剧让观众以为的要耗时长得多”。“这类工作进展缓慢，因为必须确保准确无误。”
周一通过电话联系时，皮马县警长克里斯·纳诺斯以需要维护案件调查完整性为由，拒绝就DNA样本是否来自头发、体液或其他来源置评。
“谈论这些证据是极不合适的。我们必须维护此案的调查完整性。如果我们实施逮捕，涉案人员有权获得公平审判，所以我不能在此讨论相关细节，”纳诺斯告诉哥伦比亚广播公司新闻。“我们正与所有合作伙伴全力推进此案，我们终将破案。”
如果在住宅内任何地方发现体液，那将是联邦调查局的首要工作重点，因为从体液中更容易获取完整的DNA图谱。皮肤细胞通常只能提取到低含量的DNA，难以精准锁定个人身份。
如果DNA样本来自头发，任何带有毛囊根部的完整头发所含高质量DNA的可能性，都远高于仅提取到的发丝。
接近调查的消息人士向哥伦比亚广播公司新闻透露，即便低含量样本也可通过实验室科学技术进行增强处理，但这一过程可能耗时漫长。
在案件调查早期，另一份DNA样本最终被证实是死胡同。警长办公室从距离南希·格思里住宅约2英里处发现的一副手套上提取了DNA，但最终溯源到附近一家餐厅的员工，此人与本案毫无关联。
皮马县警长办公室在向媒体提供的一份声明中表示：“在本案调查迎来一百天节点之际，科学证据处理和数字媒体分析工作仍在持续进行。”他们补充说，调查人员“正在积极追查线索和举报”，并继续鼓励任何知情者站出来提供信息。
门铃摄像头视频
除DNA线索外，另一个引发大量关注的重要线索来自Ring门铃摄像头的录像。录像捕捉到一名头戴滑雪面罩、戴手套、背着背包的嫌疑人出现在格思里家前门的画面，时间恰好是她失踪当晚。
联邦调查局表示，这段视频是从“后端系统的残留数据”中恢复的。联邦调查局局长卡什·帕特尔在近期一档播客节目中表示，他曾直接与谷歌管理层沟通以获取该视频。
联邦调查局于2月10日迅速将视频公开，希望有人能认出录像中的男子。在随后几天里，举报线索蜂拥而至，调查人员开展了多次搜查，但均未取得进展。
截至目前，联邦调查局尚未向公众发布更多相关视频，但仍在敦促民众分享任何可能与本案有关的信息，可拨打联邦调查局举报热线。
联邦调查局和警长办公室已经收到数千条线索。手机数据、监控录像、GPS数据、应用程序和云端记录以及社交媒体账号等都堆积如山，调查人员必须逐一梳理筛选。
“有时最重大的突破并非来自戏剧性的供认或好莱坞式的场面，而是来自耐心的分析，以及最终打破案件僵局的一个微小矛盾点，”帕克说道。
一百天——以及前路漫漫
曾参与失踪儿童案件、暴力犯罪调查和人质事件的执法人员都清楚，公众往往会将调查静默解读为调查停滞。
“重大调查绝非如此。媒体的关注度可能会转移，但调查人员通常不会，”帕克说。“对于受害者家属来说，一百天仿佛度日如年。但从调查层面而言，此时可能仍处于早期阶段。”
在幕后，负责格思里案的首席侦探和案件探员在过去一百天里，一直在从事公众从未见过的缓慢、令人沮丧且耗竭精力的工作：重新约谈证人、以全新视角梳理旧有线索和信息、跟进新的举报。
“他们正在寻找那些初次调查时未被注意到的细节，”帕克说道。
母亲节当天，萨凡纳·格思里在社交媒体上发布声明：“我们永远不会停止寻找你。在找到你之前，我们永远无法获得平静。”
她仍在呼吁公众提供帮助。
联邦调查局悬赏5万美元，奖励任何能帮助找到南希·格思里或逮捕并定罪涉案人员的线索。格思里家族额外悬赏100万美元征集有效信息。当地“犯罪制止者”项目提供2500美元赏金，外加密尔沃基律师迈克尔·胡皮捐赠的10万美元。
“有人知道能扭转局面的关键信息，”萨凡纳·格思里在母亲节的帖子中写道。“请继续祈祷。请带她回家。”
The Nancy Guthrie investigation could hang on a strand of DNA
May 12, 2026 / 6:00 AM EDT / CBS News
One hundred days is an agonizingly long time for a family to go without answers about their missing loved one. It’s also long enough for the investigators working the case to feel the grind.
At the 100-day mark, the investigation into the disappearance of Nancy Guthrie could hang on a strand of DNA that’s still being evaluated by scientists at the FBI laboratory in Quantico, Virginia, in hopes of identifying her abductor.
Guthrie, the mother of “Today” show co-anchor Savannah Guthrie, was reported missing Feb. 1.
The DNA recovered from Guthrie’s home in Tucson, Arizona, was first sent by Pima County sheriff’s detectives to a private laboratory in Florida for analysis. Weeks later, the DNA was shipped to the FBI’s state-of-the-art crime lab in Quantico, where law enforcement sources tell CBS News the work is ongoing.
Investigators have not publicly confirmed details about the sample or exactly where it was found.
“An item containing DNA such as a strand of hair found somewhere in a house is one thing, but a strand of hair near the victim’s last known location, such as in her bed, would be a high priority for the FBI,” said Lance Leising, a former FBI supervisory special agent in Arizona.
The painstaking process of DNA analysis, including building out family trees, doing forensic comparisons and elimination work “takes far longer than television crime dramas would have people believe,” said retired FBI Supervisory Special Agent Jason Pack. “That kind of work is slow because it has to be right.”
Reached by phone on Monday, Pima County Sheriff Chris Nanos declined to comment on whether the DNA was from a strand of hair, bodily fluid or from another source, citing the need to maintain the integrity of the case.
“It would be highly inappropriate of me to speak to the evidence. We have to keep the integrity of this case. If we make an arrest, that individual has the right to a fair trial, so I can’t sit here and address all of that,” Nanos told CBS News. “We are working hard with all of our partners to resolve this case, and we will.”
If bodily fluid was found anywhere in the house, it would be a top priority for the FBI, since it’s easier to get a full DNA profile from bodily fluid. Skin cells often yield lower levels of DNA, making it hard to pinpoint an individual.
If the source of the DNA is a hair sample, any full hair follicles that include the root would be much more likely to contain high-quality DNA than just a strand of hair.
Sources close to the investigation told CBS News that even a low-level sample can be enhanced by scientific techniques in the lab, but the process could be lengthy.
Earlier in the case, another DNA sample turned out to be a dead end. The sheriff’s department recovered DNA from a set of gloves found about 2 miles from Nancy Guthrie’s house, but eventually traced them back to a nearby restaurant worker who had no connection to the investigation.
In a statement provided to the media, a spokesperson for the Pima County Sheriff’s Department said, “As we reach the 100-day mark in this investigation, scientific evidence processing and digital media analysis remain ongoing.” They added that investigators are “actively pursuing leads and tips,” and continued to encourage anyone with information to come forward.
Doorbell camera video
Aside from DNA, the other promising lead that generated a huge amount of attention was video from a Ring doorbell camera, which captured images of a suspect wearing a ski mask, gloves and a backpack at Guthrie’s front door the night she vanished.
The FBI said the video was recovered from “residual data located in backend systems.”FBI Director Kash Patel said in a recent podcast that he spoke directly to Google leadership in order to obtain it.
The FBI quickly put it out to the public on Feb. 10 in hopes someone would recognize the man in the video. In the days that followed, tips flooded in and investigators carried out several searches that led nowhere.
So far the FBI has not released any more video to the public, but it continues to urge people to share any information that might be tied to the case to the FBI tip line.
The FBI and sheriff’s department have already received thousands of tips. Phone data, surveillance video, GPS data, app and cloud records and social media accounts also create mountains of information investigators must sort through piece by piece.
“Sometimes the biggest breakthroughs come not from dramatic confessions or Hollywood-style moments, but from patient analysis and one tiny inconsistency that finally breaks a case open,” Pack said.
100 days — and the path ahead
Law enforcement agents who’ve worked missing child cases, violent crime investigations and hostage situations know that the public often interprets silence for inactivity.
“That is not how major investigations work. The cameras may move on. The investigators usually do not,” Pack said. “A hundred days feels like forever to a family. In investigative terms, it can still be early.”
Behind the scenes, the lead detective and case agents assigned to the Guthrie case have spent the last 100 days doing the slow, frustrating and exhausting work the public never sees like, re-interviewing witnesses, sorting through old tips and information with fresh eyes, and running down new tips.
“They’re looking for the one detail that did not fit the first time around,” Pack said.
On Mother’s Day, Savannah Guthrie released a statement on social media, writing, “We will never stop looking for you. We will never be at peace until we find you.”
She continues to ask the public for help.
The FBI is offering a reward of $50,000 for information leading to the recovery of Nancy Guthrie or the arrest and conviction of anyone involved in her disappearance. The Guthrie family has offered an additional reward of $1 million for information. Local Crime Stoppers is offering $2,500 plus a $100,000 donation from Milwaukee attorney Michael Hupy.
“Someone knows something that can make the difference,” Savannah Guthrie wrote in her Mother’s Day post. “Please keep praying. Bring her home.”
