A former agent with the Federal Bureau of Investigation (FBI) is sharing his theories on the troubling disappearance of Today anchor Savannah Guthrie's 84-year-old mom, Nancy. "I think this is a personal grievance related to the family," retired FBI agent Scott Curtis exclusively told Us Weekly on Friday, February 6, of the case. "If this was about Savannah, I think there would have been some kind of direct or indirect message in these ransom notes about Savannah. And we don't see that at all. Or something Savannah said, right? And we don't see that either, based on what we've been told.