Crime alert, hourly update. Breaking Crime News now. I'm Nicole Parton. The search for Savannah Guthrie's mother,

Nancy Guthrie, who has been missing for nearly four weeks, remains active. According to authorities in

Arizona, the Pima County Sheriff's Department, along with the FBI, the Pima County Sheriff's Department,

along with the FBI, continues its efforts to locate the 84-year-old woman who was last seen at her home on January 31 before being reported missing on February 1.

Despite the investigation entering its fourth week without significant developments, the Sheriff's Department assured the public that hundreds of law enforcement personnel

are still committed to the case.

They asked me, do I have proof of life?

I ask them, is there proof of death?

I'm going to have that faith.

And sometimes that faith, that hope is all we have.

My team, 400 people out there in the field today, woke up this morning

and went out there with the hope and the belief that they're going to find Nancy.

Earlier this month, the FBI released surveillance footage featuring a mask person who appeared

to tamper with the doorbell camera on the day Nancy vanished. However, this person

has yet to be identified and all family members have been cleared as suspects. An increase in

incentive, there's a new reward being offered for information leading to Nancy's return or

information leading to charges in the case. now over $200,000 being offered

for information.

As of February 1, several hundred law enforcement personnel continued to dedicate their efforts

to the investigation, which will persist until we locate Nancy Guthrie, said the sheriff.

Detectives were seen canvassing the Guthrie neighborhood on February 21 as part of an ongoing investigation, although further details were not disclosed.

Also happening over the weekend, volunteer searchers were on foot.

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