The sheriff overseeing the missing person's investigation for Savannah Guthrie's mother, Nancy Guthrie, is sharing new insights on the case.

In an interview with People magazine published Wednesday, May 13, Pima County Sheriff Chris Nanos reflected on authorities' progress in the high-profile search operation, which commenced in early February after Nancy Guthrie was reported missing from her home in Arizona. The search reached its 100th day on Tuesday, May 12.

The "Today" show anchor's elderly mother was last seen Jan. 31 before an apparent kidnapping in her Catalina Foothills neighborhood directly north of Tucson, Arizona. In February, the FBI released images showing an armed person at Nancy Guthrie's front door tampering with the camera prior to her disappearance, but the suspect in the images has not been identified.

Nanos recalled police's early investigative efforts in his interview with People. Although the status of Nancy Guthrie's condition was not known at the time, the sheriff said the homicide division was notified after a preliminary evaluation of the crime scene didn't "look right."

"The reason that homicide was called is because they are the investigative unit in charge of missing person," Nanos told the outlet. "Search-and-rescue is their operational team that helps assist with these issues."