The mystery surrounding the disappearance of the 84-year-old mother of NBC News anchor Savannah Guthrie has deepened.

Nancy Guthrie disappeared in the middle of night from her home in Tucson, Arizona, on January 31, and authorities believe she was taken against her will.

Police in Arizona have not yet identified a person of interest in the suspected abduction and continue to investigate a series of apparent ransom notes that may have been sent from the person or people behind the alleged crime.

The Guthrie family has made several public pleas for her safe return and has asked for proof that their mother is still alive.

When did Nancy Guthrie go missing?

Guthrie was last seen at her home in Catalina Foothills, an affluent neighborhood roughly six miles northeast of Tucson, on January 31 evening, when family members dropped her off around 9:30 PM local time.

At 1:47 AM on February 1, a doorbell camera to her home was disconnected and removed. At 2:28 AM, the pacemaker app on her phone disconnected.

Concern grew when members of her church noticed her absence at a Sunday service and notified her family. After the family called 911, authorities began a search that soon included volunteers and federal officers from Border Patrol, which stretched into the next morning.

More than a week later, officials released videos showing a masked person, armed, at her doorstep the night she disappeared.

The surveillance footage revealed the person at her front door, who seemed to check the camera before covering it.

Police confirmed that blood found on Nancy Guthrie's porch was hers, increasing concerns about her safety and health, especially without her medication.

What did the alleged ransom notes say?

Authorities are investigating ransom notes that provide details specific to her home, with deadlines given for responses. The FBI is involved, having even arrested a person for sending a fake ransom note.

Despite these unsettling developments, Savannah Guthrie and her family are committed to keeping hope alive as they seek information that could lead to her mother’s return. They have publicly pleaded for anyone with knowledge regarding her whereabouts to come forward.

This heartbreaking situation unfolds against the backdrop of a prominent family and highlights ongoing concerns regarding the safety of citizens.