Investigators didn’t dig into the septic tank by accident—and the reason behind it sent a chill through everyone following the case. According to sources close to the investigation, there’s growing suspicion that Nancy Guthrie may have tried to make something disappear. The belief is simple but disturbing: she may have flushed evidence away, hoping it would never be found. That single possibility changed everything.

Investigators searching for Nancy Guthrie may have been checking her septic tank for clues that were flushed down the toilet, a former law enforcement official suggested.

Three investigators were spotted searching the tank in the backyard of Nancy’s home in Tucson, Arizona, on Sunday afternoon, as the search for “Today” show co-host Savannah Guthrie’s 84-year-old mom entered its eighth day.

“A lot of people forget that having a septic tank means wastewater doesn’t go into a city sewer, it goes into the tank,” former SWAT team captain Josh Schirard told the Daily Mail.

Law enforcement officials search the desert property surrounding the home of Nancy Guthrie in Tucson, Arizona.
4 Investigators were seen searching the area outside Guthrie’s house on Sunday.Andy Johnstone for CA Post
A Fox News screengrab shows police investigating a manhole behind Nancy Guthrie's home in Tucson, Arizona.
4 Three investigators were spotted searching the tank in the backyard of Nancy’s home in Tucson, Arizona, on Sunday afternoon.

“So, somebody may have flushed something thinking that would get rid of it, but instead it would actually just be deposited in the septic tank. It is a possibility that [investigators] are now trying to make sure that there’s nothing in there that could indicate any kind of guilt,” he continued.

Despite the week-long investigation involving the Pima County Sheriff’s Department and the FBI, there are still no suspects or persons of interest identified in Nancy’s disappearance.

The matriarch was last seen on Jan. 31 when she was dropped off at home by her son-in-law, Tommaso Cioni. Cioni is married to Savannah’s older sister, Annie.

Possible ransom notes have been sent to multiple news outlets in the past week, with one demanding $6 million worth of bitcoin.

Nancy Guthrie, mother of "Today" show anchor Savannah Guthrie, smiles while playing Mahjong.
4 Nancy Guthrie, mother of “Today” show anchor Savannah Guthrie, smiles in a photo.Courtesy NBC Universal
Overhead view of two drainage covers on a dirt and gravel path with scattered desert plants and shadows.
4 Law enforcement searched the property surrounding the Tucson, Arizona, home of Nancy Guthrie on February 8, 2026.Andy Johnstone for California Post

The timeline of the disappearance of Savannah Guthrie’s mom:

On Saturday, Savannah and her two siblings shared a second video addressing their mother’s potential captors.

“We received your message, and we understand,” Savannah said, adding, “We beg you now to return our mother to us so that we can celebrate with her.

“This is the only way we will have peace … This is very valuable to us, and we will pay,” she added.

Cops were seen back at Annie’s house on Saturday, leaving her property carrying a silver Cellebrite case, which is used to recover digital forensic evidence.