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Nancy Guthrie, 84, who lived alone, was reported missing from her Tucson-area home on Feb. 1. The FBI released video more than a week later from a camera outside her front door showing a . Her blood was found on the porch, but the case remains unsolved.

Some media outlets had previously reported receiving ransom notes in the days after Guthrie’s disappearance but had not disclosed the details while the investigation was at an early stage. Guthrie's family was aware of the notes.

Tucson TV station KOLD said Monday that it had , one demanding millions in Bitcoin in exchange for Guthrie’s return and another that said she had died. Separately, CNN cited law enforcement sources in reporting on the contents of the notes.

CNN said a note indicated that those who kidnapped Guthrie did not mean to kill her but that she died shortly after her disappearance.

“I don't have any comment on this story. I'm not involved in our coverage,” Savannah Guthrie said Tuesday, referring to NBC News. “But I can't pretend I'm not here. And since I am, I want to just take the opportunity to ask people — really to beg people — to come forward. Somebody knows something.”

The Pima County Sheriff’s Department referred questions about the ransom notes to the FBI, which declined to comment.

Volunteers and search teams filled with cactuses, bushes and boulders in the weeks after Nancy Guthrie vanished. A group recently conducted a search near the Arizona-Mexico border but didn't report finding her.

Savannah Guthrie and her siblings occasionally appeared in social media videos earlier in the saga, urging the public to come forward with tips. She to “raise your prayers with us” and acknowledged that her mother might be in heaven dancing “with our daddy.”