Shocking Clue in Nancy Guthrie Disappearance: DNA Experts Say Tiny Evidence Could Crack the Case

Nearly six weeks after Nancy Guthrie vanished from her Arizona home, investigators are chasing a new lead that could finally identify the person responsible. A forensic DNA expert now says even the smallest trace of biological evidence may hold the key to solving the mystery.

Nancy Guthrie, the mother of Today show co-host Savannah Guthrie, disappeared from her Tucson-area residence on January 31. She was reported missing the following day after relatives could not reach her. Authorities quickly discovered disturbing evidence outside the home—small drops of blood on the front porch.

Investigators believe Guthrie may have been abducted.

The disappearance triggered a nationwide search and intense media attention, especially after several alleged ransom notes were sent to media outlets in the days following her disappearance.

Now forensic experts say the suspect may have left behind crucial evidence.

April Stonehouse, a forensic science professor at Arizona State University and a former DNA analyst for government crime laboratories, says investigators could find genetic clues inside the house that help identify whoever was there the night Guthrie vanished.

Speaking to NewsNation correspondent Brian Entin, Stonehouse said she remains optimistic that investigators will uncover usable DNA.

“I would be hopeful that they found at least a few items of evidence,” Stonehouse said. “If the suspect was inside the home, they likely handled objects. That means there is a strong chance DNA was left behind. It’s just a matter of locating it.”

According to Stonehouse, biological material such as blood, saliva, and semen are among the most powerful tools forensic teams can analyze.

“You are really at the mercy of what the suspect left behind,” she explained. “Investigators will focus on objects they believe the suspect touched or used.”

One surprising detail from surveillance images may help investigators.

Last month the FBI released photos showing a masked man standing on Guthrie’s porch the night she disappeared. While the person covered part of his face, experts say the mask did not appear to cover his mouth and nose fully.

Stonehouse says that could be significant.

“That’s actually a good thing for investigators,” she said. “If the mouth and nose were exposed, there is the possibility that saliva was deposited somewhere in the home.”

Saliva traces—sometimes invisible to the naked eye—have solved countless crimes over the past two decades.

Stonehouse pointed to the infamous Golden State Killer investigation as an example of how advanced DNA analysis can crack cold cases that once seemed impossible.

“In many cases it only takes a tiny sample,” she said.

Meanwhile, another expert believes the blood droplets found outside Guthrie’s home may reveal what happened in the moments before she vanished.

Retired FBI agent Maureen O’Connell told NewsNation she believes Guthrie did not leave the home under her own power.

“What I do believe is she was carried out,” O’Connell said. “I don’t believe she walked out.”

O’Connell believes the blood pattern suggests Guthrie may have been physically removed by more than one person.

“The droplets, the lack of footprints, and the absence of any disturbance suggest she may have been carried,” she said. “It’s almost like two individuals lifted her and moved her from the porch.”

Investigators have not confirmed that theory publicly.

What authorities have confirmed is that Guthrie’s disappearance remains an active criminal investigation.

In a statement released in late February, the Pima County Sheriff’s Department said detectives remain fully committed to solving the case.

“This remains an active investigation and will continue until Nancy Guthrie is located or all leads have been exhausted,” the department said. “Resources are being refocused on detectives specifically assigned to this case.”

Deputies have also maintained a visible patrol presence in the quiet neighborhood where Guthrie lived.

The urgency surrounding the case is heightened by concerns for Guthrie’s health. Family members have said she requires daily medication, raising fears about her safety the longer she remains missing.

Savannah Guthrie has repeatedly pleaded with the public for prayers and information.

“We feel the love and prayers from our neighbors, from the Tucson community and from around the country,” she wrote in a recent Instagram post. “Please don’t stop praying and hoping with us. Bring her home.”

The family is now offering a $1 million reward for information that leads to Nancy Guthrie’s recovery. Another reward totaling more than $200,000 is available for tips that lead to the arrest and conviction of anyone involved in her disappearance.

For now, investigators say the smallest clue—perhaps a trace of DNA—could be what finally breaks the case open.