Article continues below advertisementBillboards featuring Nancy Guthrie started popping up in select states last month to aid in the search for Today star Savannah Guthrie's missing mom. An FBI spokesperson told Fox News at the time that the billboards spotlighting the 84-year-old - who vanished from her Tucson, Ariz., home on February 1 - would appear in cities across Arizona, Texas, New Mexico and California. Retired FBI agent Jennifer Coffindaffer has since shared her thoughts on the FBI's billboard campaign, sharing what she considers the "good news and the bad news.