Nancy Guthrie Update: Case Takes Sudden Turn

The search for Nancy Guthrie, the 84-year-old mother of Today host Savannah Guthrie, remains missing nearly one month after she was last seen at her home in Tucson on Jan. 31.

Two potential persons of interest were initially questioned, but both were released by authorities, who still don't have a suspect despite a $1 million reward for information regarding the whereabouts of the grandmother.

As the search continues, the case has taken a sudden and somewhat troubling turn as authorities...