Full timeline:
Saturday, Jan. 31
5:32 p.m.: Nancy Guthrie took an Uber to her daughter's home for dinner, Pima County Sheriff Chris Nanos said. Investigators have spoken with the Uber driver, he said.
9:48 p.m.: Nancy Guthrie was dropped off at home by her family, Nanos said. Her garage door opened at approximately 9:48 p.m., and her garage door closed at 9:50 p.m., he said.
Sunday, Feb. 1
Investigators believe Nancy Guthrie was abducted in her sleep early Sunday morning, according to the sheriff's department.
1:47 a.m.: Nancy Guthrie's doorbell camera disconnected, the sheriff said.
2:12 a.m.: The camera software detected a person on camera, but no video is available, the sheriff said. "They had no subscription, and therefore it would rewrite itself, kind of -- it just kind of loops right and covers up," the sheriff said. "That's what our analysis teams have told us. We're not done with that." The sheriff said there were multiple cameras at the home.
2:28 a.m.: Nancy Guthrie's pacemaker app disconnected from her phone, Nanos said.
Approximately 11 a.m.: Someone who attends church with Nancy Guthrie called the family to report that the 84-year-old never made it to services, the sheriff said.
11:56 a.m.: Relatives responded to Nancy Guthrie's home and discovered she was missing, the sheriff said.
12:03 p.m.: The family called 911, the sheriff said.
Monday, Feb. 2
The sheriff pleaded with the public for help at a news conference on Monday, saying Nancy Guthrie "did not leave on her own."
Savannah Guthrie -- who traveled to Tucson -- spoke out on social media on Monday, saying, "Thank you for lifting your prayers with ours for our beloved mom, our dearest Nancy, a woman of deep conviction, a good and faithful servant... Bring her home."
Tuesday, Feb. 3
Nanos faced reporters again on Tuesday, offering little new information and saying Nancy Guthrie's whereabouts and a potential motive remained unknown.
The sheriff's office did confirm on Tuesday that it was reviewing possible ransom notes.
Wednesday, Feb. 4
On Wednesday, Savannah Guthrie and her siblings spoke out in a heart-wrenching video and
directly addressed their mother's potential abductors.
"We too have heard the reports about a ransom letter in the media," they said. "As a family, we are doing everything that we can. We are ready to talk. However, we live in a world where voices and images are easily manipulated. We need to know without a doubt that she is alive and that you have her. We want to hear from you, and we are ready to listen. Please reach out to us."
To their mom, they said, "Everyone is looking for you, Mommy, everywhere. We will not rest."
Thursday, Feb. 5
On Thursday, the sheriff said there was still no suspect or person of interest. The FBI on Thursday announced a $50,000 reward.
Savannah Guthrie's brother, Camron Guthrie, said in a video on Thursday, "Whoever is out there holding our mother, we want to hear from you. We haven't heard anything directly. We need you to reach out, and we need a way to communicate with you so we can move forward. But first, we have to know that you have our mom. We want to talk to you, and we are waiting for contact."
Friday, Feb. 6
The Pima County Sheriff's Department said investigators were
examining a new message regarding Nancy Guthrie and were "actively inspecting" it for authenticity.
Authorities didn't say what the message said, but sources told ABC News a note was sent to a local media outlet and that it is being taken seriously by law enforcement.
Saturday, Feb. 7
Savannah Guthrie and her siblings
posted a video to social media saying they have received a message and are willing to pay.
The message from the person claiming to be the kidnapper was sent to a local media outlet and contained a Feb. 9 deadline for the Guthrie family to pay a ransom in bitcoin. Investigators said they were taking the message seriously but could not confirm its authenticity.
"We received your message and we understand. We beg you now to return our mother to us ... This is very valuable to us, and we will pay," they said.
The message they referenced is the same message the FBI and sheriff said they were studying, according to a source familiar with the investigation.
Monday, Feb. 9
Savannah Guthrie spoke directly to the camera
in an Instagram video on Monday, asking the public for help.
"We are at an hour of desperation, and we need your help," she said.
"We believe our mom is still out there. ... She was taken, and we don't know where, and we need your help," she said. "So I'm coming on just to ask you no matter where you are ... if you see anything, if you hear anything, if there's anything at all that seems strange to you, that you report to law enforcement."
"Today" host Savannah Guthrie on Monday released a new direct plea to the public, begging for help to find her mom, Nancy Guthrie, more than one week after the 84-year-old was abducted.
Over the weekend, faced with a demand for a bitcoin ransom and a Monday deadline by someone claiming to be Nancy Guthrie's kidnapper, Savannah Guthrie and her siblings said they'd pay for their mother's return.
An unverified deadline for the Guthrie family to pay the ransom, which was included in an message sent to a local media outlet by a person claiming to be the kidnapper, came and went on Monday afternoon. Investigators said they took the message seriously, but could not confirm its authenticity.
In her Instagram video on Monday, Savannah Guthrie did not mention the possible ransom demands.
"The FBI is not aware of any continued communication between the Guthrie family and suspected kidnappers, nor have we identified a suspect or a person of interest in this case at this time," the FBI said in a statement Monday night.
Tuesday, Feb. 10
Investigators release new images and video of an armed individual suspect in the search for Nancy Guthrie.
"[L]aw enforcement has uncovered these previously inaccessible new images showing an armed individual appearing to have tampered with the camera at Nancy Guthrie's front door the morning of her disappearance," FBI Director Kash Patel
said in his post.
Savannah Guthrie posted the images to her
Instagram account, with the message, "We believe she is still alive. Bring her home.”
Investigators released new images and video of an armed individual suspect in the search for Nancy Guthrie.
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