Photo of man on Nancy Guthrie’s porch may be from an earlier date, before her disappearance

A series of widely circulated images of a man on Nancy Guthrie’s front porch were not all taken the morning she disappeared from her Arizona home — one was captured earlier, two law enforcement sources close to the investigation said Monday.

The image showed the person dressed in dark clothing with a mask and gloves and, unlike other images released by FBI Director Kash Patel, without a backpack.

Patel said the image came from the same camera outside Guthrie’s front door in the Tucson area as other images captured the morning of her Feb. 1 disappearance.

A spokesperson for FBI headquarters declined to comment Monday on possible dates related to the image or whether the person is the same person seen in the other security video released by the agency.

The Pima County Sheriff’s Department said in a statement Monday that there was no date or timestamp associated with the image and that any suggestion that it was taken on a different day was “purely speculative.”

“It’s just speculation,” Sheriff Chris Nanos told NBC News. “We understand the thinking behind this, but again, I remind everyone, we follow the rules of evidence. And right now we have no evidence to suggest that this happened that day or a few days before.”

Nanos said the images are not accompanied by dates or timestamps and that officials believe the majority of the images are from Feb. 1 only because they show the doorbell disconnected.

Guthrie, 84, the mother of “TODAY” co-anchor Savannah Guthrie, was last seen Jan. 31. She was reported missing around noon the next day when she failed to show up to watch a virtual church service with friends.

The weeks-long investigation into her disappearance, now involving local, state and federal law enforcement, has attracted international attention. Although authorities believe Guthrie may have been taken from her home, no suspects or persons of interest have been publicly identified.

The images released by the FBI on February 10 represent a significant development in the investigation into Guthrie’s possible kidnapping. They showed a masked, armed man, later described as a suspect, appearing to tamper with Guthrie’s Google Nest camera.

Recovering these images appears to have been a challenge.

Guthrie did not have a subscription that would have saved the video, and Nanos said the camera was disconnected at 1:47 a.m. There were multiple cameras inside Guthrie’s home, he said, and a person was detected at 2:12 a.m., although it was unclear which camera was responsible for detecting that movement.

Patel said the FBI and Pima County Sheriff’s Department were working with “private sector partners” to recover images from “residual data in back-end systems.”

Based on the footage, officials offered identifying details about the man, describing him as being of medium build, 5 feet 9 inches to 5 feet 10 inches tall. He was carrying a black 25-liter Ozark Trail Hiker Pack backpack, sold exclusively at Walmart, authorities said.

Investigators found several sources of DNA in and around the crime scene, but testing yielded no results.

Authorities are working to test samples found at Guthrie’s home — which do not match her or anyone who was there recently — through a process called forensic genetic genealogy, in hopes of identifying a suspect.

Nanos said the DNA sample was mixed and contained genetic information from at least two people, which could take longer to test.