The Arizona sheriff leading the search for Savannah Guthrie’s 84-year-old mom is convinced she is not the victim of a burglary gone wrong — while ominously suggesting she could have been snatched in “revenge for something.”

“This is somebody who disappeared from the face of the Earth, and now we have a camera that says here’s the person who did this,” Pima County Sheriff Chris Nanos told the Daily Mail of shocking doorcam footage of the masked, armed man at Nancy Guthrie’s Arizona front door.

“And that’s what makes me say this is a kidnapping,” he said, dismissing other reports that it is being investigated as a botched burglary.

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“The motivation for it is where we get stuck, right? Is it for money? I mean, we had the one demand where they asked for money,” he said of notes that appear to have dried up despite failing to get the millions demanded in bitcoin.

“But is it really for money, or is it for revenge for something?” he asked.

Investigators are no closer to finding the “Today” show host’s mom, more than two weeks after she was presumed to have been abducted from her bed.

Despite receiving over 40,000 tips, police have yet to publicly ID a suspect and cops have faced an onslaught of criticism from those who think the probe has been bungled.

The top cop didn’t speculate further regarding potential motives.

Nanos, who has been the Pima County sheriff since 2015, previously told Fox News the burglary theory didn’t come from police, which another law enforcement source confirmed to Fox News Digital.

“This is not the working theory inside the unit,” the unidentified source said.

“Nighttime residential burglaries are so ridiculously rare. Crazy rare.”

The insider suggested burglars would more likely target commercial buildings at night, not homes.

The search for Nancy, who was last seen on Jan. 31, is now in its third week and investigators are hoping for a breakthrough after a glove containing DNA was found two miles from her million-dollar Catalina Foothills home in Tucson.

“The one with the DNA profile recovered is different and appears to match the gloves of the subject in the surveillance video,” an FBI spokesperson told Fox News.

Nanos believes there is someone who knows the person in the video.

“I believe somebody out there can look at that video and go, ‘I know exactly who that is,’” he told the Mail.

Around 16 gloves have been found in areas near Nancy’s home over the past two weeks.

Darrin Porcher, a former NYPD lieutenant, said the DNA discovery could help push the case forward.

“It’s truly a breakthrough in the case,” he told Fox News Digital.

“The DNA will go into the CODIS database, and I’m hopeful a match will occur.”

Porcher explained how the private sector could help create an image of a person based on the DNA that was found.

The video released last week showed a masked thug wearing black gloves tampering with Guthrie’s camera.

He had a handgun holstered in his pants, which former FBI agent Mark Harrigan described to The Post as a “very non-conventional way” to carry a weapon.

“He has it in the open, which is unusual, because normally you would want it concealed when you’re going to do a crime, so you’re not calling attention to yourself with an exposed firearm,” he added.

Nanos warned that authorities are not underestimating the suspect. “You never underestimate anybody,” he said.

“It’s easy to go … ‘he’s kind of a goofball.’ He may be a lot smarter than people are giving him credit for.”

The man in the video is wearing a 25-liter Ozark Trail backpack, according to the FBI.

Nanos previously described himself as a “Monday morning quarterback” when alluding to errors investigators made in the early stages of the probe.

It has sparked criticism among some that authorities had dropped the ball.

Nancy’s home was released back to the family before investigators had finished combing it for evidence.

Nanos previously admitted he would’ve delayed the decision to do that with the benefit of hindsight.

Nancy’s daughter Savannah posted another desperate appeal on social media, telling her mom’s alleged kidnappers it’s not too late for them to do what she described as the “right thing.”

“I wanted to come on … it’s been two weeks since our mom was taken and … I just wanted to come on and say that we still have hope and we still believe,” she said in an Instagram video.

“And I wanted to say that to whoever has her or knows where she is, that it’s never too late. And you’re not lost or alone, and it is never too late to do the right thing.

“And we are here, and we believe in the essential goodness of every human being, and it’s never too late.”