Article continues below advertisementTrue crime podcaster Nancy Grace weighed in on the latest developments in the case of Nancy Guthrie, the 84-year-old mother of Today show host Savannah Guthrie, centering on shocking new ransom notes received by TMZ on April 6 claiming the missing woman is dead.The notes also provide a specific location for the first time: the state of Sonora, Mexico.The sender of the most recent notes, who has contacted TMZ multiple times, alleges they saw Nancy alive with her abductors in Mexico, but now claims she's dead.