Timeline of Savannah Guthrie’s mother’s disappearance and criminal investigation

The search for Savannah Guthrie’s mother, Nancy Guthrie, continues.

The Pima County Sheriff’s Department (PCSD) began an emergency search for Nancy on February 1st, the day after she disappeared on January 31st. Sheriff Chris Nanos shared an update during a Feb. 2 press conference, acknowledging that the missing person search is now being treated as a “crime” following a “concerning” incident at an Arizona home.

“This is an 84-year-old woman who suffers from several physical illnesses, has physical problems, and requires medication, which can be fatal if not taken within 24 hours,” Nanos revealed. “So we implore anyone who knows anything about this, who saw anything, who heard anything, to contact us. Please call 911. We don’t need another terrible, tragic ending. We need help.”

In an interview with NBC’s Liz Kreutz for the Today show on Feb. 3, Nanos called the case a “race against time” and said, “I hope that window never closes.”

Here is the complete timeline of Savannah Guthrie’s mother Nancy’s disappearance.

Jan. 31, 9:30 p.m.: Nancy was last seen at her home in Arizona.

Nancy was last seen around 9:30pm local time on Saturday, January 31st. She was at her home near East Skyline Drive and North Campbell Avenue outside Tucson, Arizona.

February 1st, 12:00 p.m.: Nancy is reported missing by her family after a friend notices that she has been absent from church.

Nancy’s disappearance was first reported after a friend from Nancy’s church noticed she wasn’t attending a service and called one of her adult children, Nanos said at a news conference.

Then, around noon on Sunday, February 1st, after encountering a disturbing scene at Nancy’s home, Nancy’s family called 911 to report her missing.

“We receive calls like this frequently and we search the area frequently,” Nanos said. “But this incident stood out because of what was described to us at the scene and because we discovered and located it just by looking at the scene.”

February 1: Savannah is absent from the Today show and releases a statement through her co-anchor.

Savannah was absent from Today’s broadcast on February 1st, but the show began with co-anchor Craig Melvin announcing Nancy’s disappearance and then reading a statement from the Guthrie family.

“On behalf of my family, I would like to thank everyone for their thoughts, prayers, and messages of support,” the statement said. “Right now, our focus remains on the safe return of our beloved mother. We appreciate the efforts of law enforcement on this case and encourage anyone with information to contact the Pima County Sheriff’s Department at 520-351-4900.”

February 1: PCSD begins search for “vulnerable adult”

PCSD began an emergency search for Nancy on February 1, deeming her a “vulnerable adult.” Nanos said at a news conference the same day that Nancy was considered to be “in poor health.”

He said she had “no cognitive issues” but had “some physical ailments that limit her ability to move around.”

Savannah’s friend and co-worker Jenna Bush Hager later added that Nancy takes the medication she needs every day “to survive.”

February 2: Sheriff says Nancy investigation is being treated as a “crime”

At a press conference on February 2, Nanos revealed that the disappearance is currently being investigated as a crime.

“Now that we have processed that crime scene, we believe there is an actual crime scene, an actual crime occurred, and we are asking for the community’s assistance,” he said.

The sheriff said there was reason to believe Nancy was “of sound mind” and “did not leave on her own.”

February 2: Savannah asks her Instagram followers to pray for her mother’s safe return

Colleagues released a statement on behalf of the Guthrie family on February 1st, but Savannah directly acknowledged her mother’s disappearance in an Instagram post on February 2nd, asking her followers to pray for Nancy’s safe return.

“We believe in prayer. We believe in voices raised in unison full of love and hope. We believe in goodness. We believe in humanity. Above all we believe in the Lord,” she captioned the photo, writing, “Pray.”

“Thank you for joining us in your prayers for our beloved mother, our beloved Nancy, a woman of deep faith, a good and faithful servant,” Savannah continued. “Please join us in raising your prayers and believe with us that she will be saved by them at this moment.”

The broadcaster continued the post by quoting a Bible verse, then concluded by writing, “Take her home.”

February 2: Biological DNA from Nancy’s home is submitted to the lab.

A local sheriff in Arizona told PEOPLE that investigators found “biological DNA” evidence at Nancy’s home. Although they did not reveal its nature, law enforcement confirmed that the DNA evidence belonged to Nancy.

Nanos told PEOPLE that in addition to using search and rescue teams and reviewing surveillance footage, investigators have “obtained what we believe to be biological DNA type evidence and are submitting it to a lab.”

February 3: Police offer reward to informer

As the search for Nancy continues, PCSD announced on February 3 that it is offering a reward of up to $2,500 for information related to Nancy’s disappearance. They are “asking for the public’s assistance with any information related to the incident,” including asking for “any video or photographic information” from the scene near her home.

We recommend calling 88-CRIME or 520-882-7463. All calls remain anonymous. Anyone with information can also use the mobile app P3TIPS or visit 88crime.org.