A hair sample recovered from the scene where 84-year-old Nancy Guthrie vanished could not yield a usable DNA profile, the Pima County sheriff disclosed, marking a forensic setback in a case that has stretched past four months without an arrest or a confirmed sighting of the missing woman.

Sheriff Chris Nanos delivered the update in comments first detailed by Fox News, acknowledging that the hair evidence collected from Nancy Guthrie's Tucson-area home failed to produce results that could identify or exclude a suspect. The disclosure lands at a moment when investigators badly need traction. Guthrie, the mother of NBC "Today" show anchor Savannah Guthrie, disappeared from her home in the middle of the night, and authorities have publicly confirmed signs of forced entry consistent with what they have described as a kidnapping.

What investigators found, and what they did not

The hair sample was one of several pieces of physical evidence gathered from the residence after Guthrie was reported missing. Investigators found signs of forced entry at the home, a detail that led authorities to characterize the disappearance as a nighttime abduction. DNA samples were collected and submitted for laboratory analysis, but Nanos told reporters the results have not pointed to any suspect.

"We've gotten some back, but nothing to indicate any suspects," Nanos said of the DNA analysis, as Newsmax reported.

The inability to profile DNA from the hair is a meaningful gap. Hair evidence can be powerful in criminal investigations, but only when the root or follicle is intact enough to extract nuclear DNA. Without that, forensic labs are left with mitochondrial DNA at best, which narrows but does not uniquely identify a person. Authorities have not publicly stated which type of analysis was attempted or why the profiling failed.

A glove, a backpack, and a masked figure

The hair sample failure does not mean the case is without physical evidence. In a separate and potentially more promising development, the FBI disclosed that a glove found in a field roughly two miles from Guthrie's home contains DNA that preliminarily matches a glove worn by a masked suspect captured on porch surveillance footage the night she disappeared. The bureau received preliminary DNA test results and is awaiting official confirmation, AP News reported.

That surveillance footage shows a man described as approximately 5 feet 9 inches tall with a medium build, carrying an Ozark Trail Hiker Pack backpack, standing outside Guthrie's front door. Investigators have also towed a Range Rover SUV as part of the probe, conducted a traffic stop detention, and executed a court-authorized search south of Tucson.

The contrast between the two pieces of evidence tells the story of a case that keeps lurching between dead ends and glimmers of progress. The sheriff has maintained publicly that he remains optimistic the case will be solved, but the clock keeps running.

Surveillance, cell towers, and the digital trail

Beyond physical evidence, investigators have been combing through surveillance video from the surrounding area, cellphone tower data, and license plate reader camera footage. These digital tools can establish timelines and place vehicles or phones in proximity to the crime scene, but authorities have not announced any breakthroughs from that work.

The Pima County Sheriff and the Tucson FBI field office held a joint press conference urging the public to come forward with tips. That appeal underscores a reality familiar to anyone who follows cold or stalled investigations: when forensic evidence fails to deliver, human intelligence often fills the gap.

The case has also attracted unwanted interference. A California man pleaded guilty to sending fake ransom notes tied to the disappearance, a cruel hoax that diverted investigative resources and compounded the family's anguish.

A daughter's plea

Savannah Guthrie has made repeated public appeals for her mother's safe return. The 84-year-old requires daily medication to survive, a fact that adds urgent medical stakes to an already desperate situation.

"Raise your prayers with us and believe with us that she will be lifted by them in this very moment. Bring her home."

That was Guthrie's appeal early in the investigation. More recently, she posted an Instagram video directed at whoever took her mother, striking a tone that mixed grief with a deliberate effort to offer a way out.

"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, that it's never too late."

The emotional toll on the family has been visible and sustained. Savannah Guthrie broke down on live television after one of the fake ransom notes claimed her mother was dead, a claim that investigators have not corroborated.

Where the case stands

No suspects have been publicly identified. No arrest has been made. The masked figure on the surveillance footage remains unidentified, though the glove DNA match, if officially confirmed, could change that calculus fast. Investigators will need to determine whether the DNA from the recovered glove can be matched to any individual in law enforcement databases or connected to someone already on their radar.

The relationship between the Pima County Sheriff's Office and the FBI has drawn scrutiny as the investigation has worn on, with both agencies working the case but not always projecting a unified front. Whether those tensions have affected the pace or direction of the probe remains an open question.

Authorities have not publicly confirmed whether Nancy Guthrie is alive. They have not disclosed a motive. They have not said whether the suspect seen on camera acted alone or had help. Each of those blanks represents an investigative requirement that remains unfilled more than four months after an elderly woman was taken from her own home in the middle of the night.

When the forensic evidence cooperates, cases like this can break wide open overnight. When it does not, the burden shifts to shoe-leather work, public tips, and the hope that someone with knowledge decides that doing the right thing matters more than staying silent.