Pima County Sheriff, Chris Nanos on the Today Show; Nancy Guthrie

Sheriff Chris Nanos and Nancy Guthrie.Credit : NBC; Savannah Guthrie/Instagram

The sheriff in charge of the Nancy Guthrie abduction case is offering new details about the significance of Jan. 11 in the investigation.

Pima County Sheriff Chris Nanos previously said local authorities and the FBI were seeking surveillance footage from Jan. 11, after Google initially indicated a key image showed a suspect without a backpack. He later clarified that the date of the image could not be confirmed.

In a new interview with local Tucson, Ariz., station KOLD, Nanos said Jan. 11 was still a date investigators were looking into.

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“We do believe that something occurred on Jan. 11 and that’s with the FBI’s analysis of the equipment and digital stuff they’ve done,” Nanos told KOLD.

He added that the interest in the date remains speculative and would not share any evidence the investigators have which explains the significance of that date.

Nancy Guthrie and Savannah Guthrie in 2015

Nancy Guthrie and Savannah Guthrie in 2015.Don Arnold/WireImage

Nanos also confirmed that the investigation into Nancy’s disappearance remains ongoing almost two months after Savannah Guthrie’s 84-year-old mother was taken from her home.

“We have so much in front of us. And we believe we have good evidence in front of us,” Nanos said. “Will that dry up? Could I be wrong? Absolutely. Anything is possible, but we’re not giving up.”

Nancy Guthrie, Nest Camera

Surveillance footage of a masked intruder outside of Nancy Guthrie’s home on Jan. 11.Pima County Sheriff’s Department

Nanos’ latest comments on the Jan. 11 date come as investigators continue to sort out details he discussed in an interview with NBC News’ Liz Kreutz one day prior.

Kreutz explained on the Today show on Monday, March 23, that while trying to recover footage from Nancy’s Nest camera, investigators reached out to Google, which owns Nest. Google initially indicated that one of the surveillance images was from Jan. 11, but later said the exact date could not be confirmed.

Nancy Guthrie, Nest Camera

Intruder captured on camera outside of Nancy Guthrie’s home on Feb. 1.Pima County Sheriff’s Department

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Most recently, the Guthrie family included the date in their statement to the public, asking for renewed interest in the case.

“We hope people search their memories, especially around the key timelines of January 31 and the early morning hours of February 1, as well as the late evening of January 11,” the family was quoted as saying during KVOA News 4 Tucson’s special Bring Her Home: The Disappearance of Nancy Guthrie on Saturday, March 21.

Nancy was taken from her Arizona home in the early morning hours of Feb. 1. Despite the public attention to the case and the offer of a $1 million reward from the Guthrie family, no suspects or motive have officially been named.