TUCSON, Ariz. — Authorities are intensifying the search for Nancy Guthrie, the mother of 'Today' show host Savannah Guthrie, as the investigation enters its sixth day. Frustration mounts as the sheriff reveals that the doorbell camera at Nancy's home was inactive on the day she was reported missing, hindering efforts to gather crucial evidence.

Sheriff Chris Nanos expressed disappointment, stating, It is concerning; it’s almost disappointing because you’ve got your hopes up.

Reports indicate that DNA evidence found on Nancy's porch matched her own, suggesting she was taken against her will. As the search continues, concern for her health escalates as she requires daily medication for various health issues, including a pacemaker and high blood pressure.

In a heartfelt video message, Savannah Guthrie and her siblings have reached out to their mother’s kidnapper, asking for proof of her safety. The family has received ransom notes demanding payment, with missed deadlines increasing tensions.

The FBI is involved, stating they are treating the ransom notes seriously, while the sheriff admits there are many aspects of the investigation that remain undisclosed. The community remains on alert as they hope for the safe return of Nancy Guthrie.