New Delhi, Aug. 4 -- More than six months have passed since Nancy Guthrie, the 84-year-old mother of "Today" show host Savannah Guthrie, was last seen at her home in Tucson, Arizona. Last week, investigators probing her disappearance released two ransom notes in the hope that the messages would help identify those responsible. However, one of the notes appeared to contradict comments made by Pima County Sheriff Chris Nanos during an interview the previous day.

Nanos, in an interview with CBS News on July 30, said, "I have nothing to indicate she's dead," and added, "I don't have a body. I don't have a burial site. I don't have any note." However, investigators released two ransom notes on July 31. The Pima County Sheriff said the notes w...