An anonymous donor has added $100,000 to the FBI's existing reward in the case of Nancy Guthrie, the 84-year-old mother of Today show host Savannah Guthrie, who has now been missing for 18 days under deeply suspicious circumstances.

The total reward for information leading to an arrest now exceeds $200,000, according to Hello! Magazine.

And there are new developments that suggest investigators may be closing in. CBS News reports the FBI now has photos and names of people they believe may be the suspect captured on surveillance video outside Nancy Guthrie's home.

What We Know

Nancy Guthrie was last seen just before 10 p.m. on January 31, when she was dropped off at her Pima County home after a game night with her daughter, Annie Guthrie, and Annie's husband, Tommaso Cioni. She never made it to her usual church service the next morning. Her family reported her missing on February 1.

What investigators found was chilling. Blood on her doorstep. Doorbell camera footage showing an unidentified individual dismantling the camera just before 2 a.m. on February 1, roughly four hours after Nancy arrived home.

Someone came to that house in the dead of night, ripped out the camera, and left blood behind. The 84-year-old grandmother has not been seen since.

The Backpack, the Glove, and the Trail

Investigators have been methodical. They went door to door asking neighbors for access to surveillance footage. They enlisted Google to help retrieve additional footage from cameras around Nancy's home. And they've been chasing physical evidence with precision.

Pima County Sheriff Chris Nanos revealed that the individual in the surveillance footage was carrying a backpack that had been traced to a single retailer:

"That backpack, we could positively now identify as a backpack that is sold at one place only. That's Walmart."

Nanos said his team is now working with Walmart managers across Arizona to identify recent purchases of that specific backpack, examining sales records going back 20 to 60 days. Law enforcement is also in contact with several gun stores to trace the origin of a gun holster connected to the suspect.

A black glove recovered near Nancy's home was sent for DNA testing, but the results returned no matches in the Combined DNA Index System, the national database known as CODIS. That means whoever left it behind has no prior DNA profile in the system. It's a lead that didn't break open, but it narrows the picture.

Family Cleared, Border Ruled Out

Sheriff Nanos moved forcefully to shut down speculation about the family's involvement. In a statement, he made the case without ambiguity:

"To be clear…the Guthrie family – to include all siblings and spouses – has been cleared as possible suspects in this case. The family has been nothing but cooperative and gracious, and are victims in this case."

He went further, calling out those spreading unfounded theories:

"To suggest otherwise is not only wrong, it is cruel. The Guthrie family are victims plain and simple."

Authorities have also ruled out the possibility that Nancy was taken across the border into Mexico, despite her home sitting just 60 to 70 miles from the border.

Eighteen Days and Counting

This case has every ingredient that should command national attention, regardless of the victim's famous daughter. An elderly woman. A home invasion in the middle of the night. Blood evidence. A suspect brazen enough to dismantle a doorbell camera on his way in. And an 84-year-old who simply vanished.

The doubling of the reward signals that both federal authorities and private citizens understand the urgency. The FBI's involvement, the coordination with major corporations like Google and Walmart, and the expanding forensic effort all point to a case being treated with the seriousness it demands.

But seriousness and results are not the same thing. Eighteen days is a long time for an 84-year-old grandmother to be missing. Every day that passes without answers weighs on a family that has done everything right, cooperated fully, and now waits.

Someone in Pima County knows something. The question is whether $200,000 is enough to make them talk.