An extensive search for Nancy Guthrie, 84, is now in its third week

With so many ways to communicate, why does law enforcement still use billboards to get the word out in missing person cases or suspected abductions, such as the search for

Potential Google searches for Nancy Guthrie's address occurred weeks before the suspected kidnapping of Savannah Guthrie's mother in Tucson, Arizona.

The sheriff’s office said they ruled out Guthrie’s three adult children and their spouses as suspects.

The disappearance of Nancy Guthrie, 84, the mother of the “Today” show anchor Savannah Guthrie, has gripped the nation, with unverified reports of ransom notes, chilling doorbell camera footage and the fame of Ms. Guthrie’s daughter capturing intense interest.

You’ll notice more patrol cars, checkpoints and investigators in the neighborhood as authorities intensify their efforts around the Nancy Guthrie disappearance. The sheriff warns people to expect increased daily police activity as the search continues and investigators follow every lead.

For nearly two decades, viewers have been witnesses to a strong bond between Savannah Guthrie and her mother, Nancy, who Hoda Kotb describes as “everybody’s mom.” NBC’s Joe Fryer reports for TODAY on