India, Aug. 4 -- It has been 184 days on Monday since NBC host Savannah Guthrie's mother, Nancy Guthrie, disappeared from her home near Tucson, Arizona. In the last major update on the case, the ransom notes received for the 84-year-old were made public on Friday.

The Pima County Sheriff's Department and the FBI sought help from the public in identifying the handwriting of the individuals who wrote the notes. So far, however, no major lead has come.

As the two ransom notes- received between February 2 and 3, seeking $4 million in bitcoin- were made public, the Guthrie family's dealings with the sender became a major topic of discussion. Savannah, her siblings Annie and Camron, made a video then demanding proof of life but later even agr...