TUCSON, ARIZONA — Nancy Guthrie, 84, was reported missing from her home near Tucson, Arizona, on Feb. 1. She was last seen on the night of Jan. 31 around 9:45 p.m.

An initial ransom note was sent on Feb. 2, demanding $4 million in Bitcoin for Guthrie's release. The note described her as "safe but scared," and stated the demand would increase to $6 million if not received by Feb. 9. Officials sent $152 to the Bitcoin address provided, an attempt to trace the recipient when the Bitcoin was converted to cash; however, the Bitcoin sent by officials remained untouched.

A second note arrived on Feb. 6 from the same IP address as the first. Three people familiar with the matter stated the note indicated Guthrie had died. Sources close to the investigation stated the note included an apology for her accidental death and suggested her body could be returned for a price, though no specific amount was given. Jessica Bobula, news director for KOLD, said the second note differed from the first. The three people familiar with the matter added that it did not include an apology or request for payment for the release of Guthrie's body.

FBI agents recovered doorbell camera images showing an armed and masked man outside Guthrie's home on the morning she disappeared. The FBI described the man in the surveillance footage as a suspect, noting he was of average build, 5 feet 9 inches to 5 feet 10 inches tall. The suspect was also described as wearing a black Ozark Trail Hiker Pack 25-liter backpack.

Savannah Guthrie, Nancy Guthrie's daughter and TODAY show co-anchor, posted a video to Instagram on Feb. 15 addressing her mother's possible kidnapping. She appeared in the video alongside her brother Camron and sister Annie. "We received your message and we understand," she said. She also stated, "This is very valuable to us, and we will pay." Savannah Guthrie urged for her mother's return. "We beg you now to return our mother to us so that we can celebrate with her," she said. She also offered $1 million for Nancy Guthrie's return. "It is never too late to do the right thing," she said in the video. She acknowledged the possibility of her mother's death. "We know that she may be lost," she said. "She may already be gone."

No arrests have been made in the case.