Nancy Guthrie Update: Officials Announce Warning for Those Interested in Case

On, Thursday, March 5, the search for Nancy Guthrie, the mother of NBC "Today" show host Savannah Guthrie, officially entered day 33, and now, experts have a new warning for those following the case.

Nancy Guthrie went missing from her Tucson, Arizona, home on Feb. 1. Authorities believe she was taken against her will, and they're still trying to find her.

Now, officials warn that law enforcement presence has dropped substantially at the crime scene, since the investigation is 33 days in, and that presents a new danger.

Nancy Guthrie Update Today: Officials Warn of New Dangers as Investigation Enters Day 33

In a Thursday, March 5, feature for Fox News Phoenix, Christina Dugan Ramirez and Michael Ruiz discuss a new danger that's emerged at the scene. In the piece, a law enforcement expert warns that Nancy Guthrie's abductor could return to crime scene.

"They could [have eyes on the memorial], we're just not seeing it," Betsy Brantner Smith, spokesperson for the National Police Association and a retired police sergeant, told Fox News Digital in an interview. "They could be keeping track of it, but we're not seeing the cameras."

Smith warned that it's cases such as these where there's the possibility of the suspect resurfacing because he or she is obsessed with the Guthrie family or celebrity.

"In this type of situation where you have the potential for a suspect having done this because he or she is somehow obsessed with Savannah Guthrie or seeing Nancy featured on the 'Today' show multiple times… someone who is obsessed with notoriety, celebrity — there's a lot of pathology involved in that," Brantner Smith stated.

Brantner Smith added that this is also "type of person that could come back to the memorial, look at the memorial, even take photos of the memorial and add to the memorial themselves."

It's quite creepy to think that the suspect could have visited the memorial and been amongst the public, fully knowing what happened to Nancy Guthrie.

Brantner Smith even said that the suspect may have left flowers and a note at the crime scene. "Sometimes the offender will come back to the scene of the crime. So, in that vein, they would come to the memorial, and they may have left their own note, their own flowers," she said.

She said coming back to the scene is usually a sign of arrogance, because the person who did the deed doesn't think they'll get caught. Another idea is that the suspect is curious about what the letter at the memorial say. It's all about psychology.

"We've got to look at the psychology of people who do this kind of stuff," she said. "They also may want to come back to see what kind of people are leaving notes and leaving flowers."

Expert Discusses How Digital Forensics May Help in the Nancy Guthrie Investigation

While so suspect has been announced yet, Heather Barnhart, a digital forensics expert with the SANS Institute and Cellebrite, says digital forensics may help reveal the suspect.

"People forget how much their data spreads across devices. So the same thing that makes investigations hard make it hard for criminals to clean up," said Barnhart.

"Your phone is the silent witness to your life. It knows everything you do," Barnhart added. "So forming those patterns and then looking for any anomaly of someone trying to hide their digital footprint is key here."