India, Feb. 25 -- Nancy Guthrie's daughter, Savannah Guthrie, is offering a $1 million reward for the return of her 84-year-old mother, who remains missing. A source has now explained to Page Six the tactic behind Savannah's latest move.

The source told the outlet that the family hopes the reward will "help stimulate or further incentivize" a lead or tip from "someone who has thus far been reluctant" to come forward. "The family first raised this on the first day of the investigation and has been ready to do this ever since," the insider said, adding that until now, the family had been advised to hold off on offering their own incentive.

"They were advised by all involved in the investigation that doing so earlier might overwhelm the in...