Guthrie returns to 'Today' show

After a 65-day hiatus, Savannah Guthrie resumed her duties on the 'Today' show despite no resolution in the search for her 84-year-old mother.

The investigation has been complicated by a series of ransom notes, the latest of which allegedly demanded cryptocurrency in exchange for information on Nancy Guthrie's location.

Authorities and the FBI continue to review all tips, including claims that the missing woman may be in Mexico.

Guthrie and her family have offered a $1 million reward for information leading to her mother's safe return.