'It's never too late,' Savannah Guthrie says in new plea

Investigators continue to search for Nancy Guthrie, the 84-year-old mother of “TODAY” co-anchor Savannah Guthrie, whose disappearance has transfixed the nation.

Guthrie was reported missing Feb. 1 from her home near Tucson, Arizona. She was last seen the previous night around 9:45 p.m, according to Pima County Sheriff Chris Nanos. Authorities have described the case as a possible kidnapping or abduction, but clues have been scarce.

Investigators got a major break in the case last week after the FBI recovered chilling doorbell camera images of an armed and masked man outside Guthrie’s home on the morning of her disappearance. The FBI has since described that man as a suspect.

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Investigators have fielded over 30,000 calls for leads in the Guthrie case, the Pima County sheriff told NBC affiliate KVOA of Tucson.

Sheriff Chris Nanos said the calls have come into his department and the FBI, KVOA reported. He told the station he believes investigators are making progress.

Several hundred law enforcement personnel are working on the case, he told the station.

Investigators are not categorizing the Nancy Guthrie case as any particular type of crime at this stage, according to a federal law enforcement source with knowledge of the investigation. 

The source said that there are a "myriad of theories" but that authorities are not officially narrowing options to a specific one.

Savannah Guthrie shared a new video on Instagram tonight pleading for the person who took her mother to come forward.

“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.

She addressed whoever has her mother or knows where she is, saying: “It’s never too late.”

“You’re not lost or alone, and it is never too late to do the right thing,” she said. “We are here. And we believe. And we believe in the essential goodness of every human being.”

A "Bring Her Home" banner set up outside NBC affiliate KVOA of Tucson has become a gathering place for the community grappling with Nancy Guthrie's disappearance.

Jesse Kirsch / NBC News

People from Alaska, Florida, Michigan, Ohio, Minnesota, New Mexico and other states have signed the banner.

“Michigan prays for your return,” one message read. Another said, “Hope and love,” signed by a person from Fairbanks, Alaska.

Jesse Kirsch / NBC News

The Combined DNA Index System, or CODIS, is the FBI's massive database of DNA profiles. It is considered one of the most powerful crime-solving tools in modern history.

Often, DNA samples are submitted to CODIS to determine if they will pull up matches. CODIS has 19 million offender profiles and over 1 million forensic profiles, according to the FBI. As of November, CODIS has had over 781,492 hits and assisted in over 758,000 investigations. 

The system is also used to solve cold cases and exonerate people who were wrongly convicted.

The FBI shared images Tuesday retrieved from backend systems of Nancy Guthrie’s doorbell camera showing a masked and armed person at her doorstep.

Just today, a source familiar with the matter told NBC News that a glove worn by the person seen in the video appears consistent with a glove recovered roughly 2 miles from Guthrie’s home.

Here’s what we know so far about the suspect in her disappearance:

• The FBI has described him as a man with an average build.
• He was described as being 5 feet, 9 inches to 5 feet, 10 inches tall.
• He was also seen wearing a black, 25-liter Ozark Trail Hiker Pack backpack.

The media presence on Guthrie's street appears to have grown since yesterday. Several news crews are positioned along the block, and a sheriff's deputy remains parked in the driveway of her home. A drone flew overhead.

Minyvonne Burke / NBC News

At one point, a man stopped briefly to drop off flowers at the house before he left.

FBI testing DNA found on glove consistent with type seen on Guthrie doorbell video

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A glove containing DNA evidence was recovered roughly 2 miles from Guthrie’s home and appears consistent with a glove worn by a person seen in a doorbell camera video from the morning she disappeared, according to a source familiar with the investigation.

The glove was one of 16 recovered over several days in areas surrounding Guthrie’s home, the person familiar with the matter said. Investigators have determined that most of the gloves belonged to searchers combing the area for evidence.

Following some additional testing today, the person said, the DNA profile, which matches that of an unknown male, will be added to the national DNA database managed by the FBI, called CODIS, which stands for Consolidated DNA Index System.

DNA samples can be submitted to the massive database for possible matches. CODIS has 19 million offender DNA profiles and over 1 million forensic profiles, according to the FBI.

But a match would not necessarily break the Guthrie case. The FBI says the DNA matches a male, and it has not indicated a match to Guthrie. Whoever left the glove would not necessarily be a potential suspect and might not even be related to the case.

Law enforcement experts say that at best it could be a helpful lead.

At St. Andrew’s Presbyterian Church, where Guthrie had connections, her name was mentioned at least once during prayers this morning.

“Lord, you’re with Nancy even now. We pray for her,” a speaker said. “Guide those who are seeking to find her. ... Let your peace wash over Nancy’s family.”

Few churchgoers were willing to speak publicly afterward, and the atmosphere was subdued.

At a farmers market near Guthrie's home this morning, vendors said her disappearance has left many in the community unsettled and searching for answers.

Sandra Carey, who lives in Amado just south of Tucson and sets up her produce stand at the market every weekend, described the area as friendly and tight-knit. She called it "a great community" and said she's struggling to make sense of what happened.

“How can someone kidnap an 84-year-old woman?" she said. "I don’t know what’s going on. The pictures of the masked man at the door, the whole thing is just scary.”

Phoebe Waybright, who lives in Vail and runs a pet treat stand at the market everyweekend, called the case “mind-boggling.”

The neighborhood around Guthrie’s home remained largely quiet this weekend. A sheriff’s deputy was stationed in the driveway last night, and media vehicles continued to line the street.

Community members continued to leave yellow flowers outside the home, a visible sign of support as the search stretches into its second week.

The search for Guthrie stretched into its 14th day today, with investigators continuing to pursue leads after a recent court-ordered search did not result in any arrests.

Two sources familiar with the investigation told NBC News that authorities are leaning away from considering the man whose home was searched Friday night as a suspect. Investigators are also leaning away from a man named Carlos, who was stopped in a car last week, as a suspect, the sources said.

In addition, investigators are leaning away from any relatives of Guthrie as suspects, according to the sources. They cautioned that no one has been officially ruled out, and investigators continue to focus on other leads.

Law enforcement officials executed a federal search warrant at a home near Guthrie’s residence at East Orange Grove Road and North First Avenue on Friday night. Authorities confirmed that no arrests were made after the search. Deputies also conducted a traffic stop connected to the case, questioning one person, but no one was taken into custody.