Today show co-host Savannah Guthrie appealed to the alleged kidnapper of Nancy Guthrie to “do the right thing” as the investigation into her 84-year-old mother’s disappearance enters its third week.

Savannah Guthrie posted an emotional message to Instagram on Sunday night to mark two weeks since her mother disappeared from her Tucson, Arizona, home. In the roughly 1-minute video, she emphasized that she and her family “have hope” and “still believe,” urging the kidnapper to return Nancy Guthrie.