NewsNation correspondent Brian Entin has highlighted significant discrepancies in the handling of DNA evidence and the overall timeline in the investigation into the disappearance of Nancy Guthrie. The 84-year-old mother of “Today” show co-anchor Savannah Guthrie vanished from her Tucson home in the early hours of February 1, 2026, following a family dinner the previous evening. Entin’s reporting has drawn attention to delays in processing forensic material that some sources claim slowed critical early breakthroughs in the case.

Nancy Guthrie was last seen on January 31 after her son-in-law Tommaso Cioni drove her home from dinner at the residence he shares with her daughter Annie Guthrie. Surveillance footage captured her arrival around 9:50 p.m. The following morning, she failed to appear for a scheduled church livestream. Family members discovered her phone and other personal belongings still inside the Catalina Foothills home, prompting immediate concern given her reliance on a pacemaker and daily medications. Pima County Sheriff’s deputies opened the case as a suspected abduction due to the absence of any indication she left voluntarily.

Forensic teams recovered multiple DNA samples, including hairs, from inside Nancy Guthrie’s residence in the days after her disappearance. A private laboratory in Florida initially processed some of the material before it was forwarded to the FBI for further analysis. Reports indicate that mixed DNA profiles complicated separation efforts, requiring advanced techniques to distinguish contributors. Entin has reported on the extended time it took for certain samples to reach federal labs—more than two months in some accounts—raising questions about whether initial assessments by local and federal authorities accurately reflected the urgency of the evidence.

The timeline dispute centers on when specific DNA results became available and how they were interpreted in the early stages of the probe. Some insiders have suggested that preliminary findings were not fully leveraged to redirect resources as quickly as possible, potentially allowing valuable leads to cool. Entin’s coverage has pointed to inconsistencies between public statements from law enforcement and the practical realities of evidence processing, including backlogs at both the private lab and FBI facilities. Officials have maintained that all proper protocols were followed and that the family cooperated fully from the outset.

Pacemaker data has also played a key role in shaping the investigative timeline. The device reportedly stopped syncing with Nancy Guthrie’s connected devices around 2:28 a.m., providing a potential anchor point for activity inside the home. Combined with doorbell camera disconnections and other digital records, this information has helped investigators reconstruct the critical overnight hours. Tommaso Cioni previously admitted to re-entering the residence during an approximately 90-minute window after initially dropping her off, according to earlier developments in the case.

Brian Entin has consistently reported from Tucson, detailing searches, surveillance footage reviews, and evolving theories that include the possible use of signal-jamming devices to disrupt security systems. His reporting has brought forward anonymous sources within the investigation who expressed frustration over perceived missteps in prioritizing DNA evidence. While the FBI has received and begun analyzing hairs and other biological material sent from the Florida lab, an official noted that the transfer followed standard procedures rather than representing newly discovered items.

The Guthrie family has faced intense public scrutiny throughout the ordeal. Savannah Guthrie has continued her broadcast duties while supporting private efforts to locate her mother. Annie Guthrie and Tommaso Cioni have appeared publicly alongside her at memorials and in appeals for information. Early in the investigation, Pima County Sheriff Chris Nanos stated that family members, including spouses, had been cleared as suspects and described them as cooperative victims. No arrests have been made in connection with the abduction itself, though a separate individual faces charges related to a fake ransom text.

As the search enters its fourth month, authorities continue to pursue leads across the Tucson area and surrounding desert terrain. Aerial and ground searches have been supplemented by forensic re-examinations and digital analysis. The case has highlighted challenges in processing mixed DNA samples and the importance of rapid lab turnaround in missing persons investigations involving vulnerable adults. Entin’s reporting has kept national attention focused on these procedural questions without assigning definitive blame to any agency.

Pima County Sheriff’s Office and the FBI have declined to comment on specific criticisms regarding timelines or potential cover-ups, citing the active status of the investigation. Both agencies emphasize that every piece of evidence continues to be reviewed thoroughly. Investigators urge anyone with information about Nancy Guthrie’s whereabouts or events from the night of January 31 to contact authorities. Despite the forensic disputes and timeline questions raised by Entin and others, Nancy Guthrie remains missing, and the full circumstances of her disappearance have yet to be determined.