A former FBI agent provides an explanation for the ongoing police activity at Savannah Guthrie's sister Annie Guthrie's home amid the ongoing search for their missing mother, Nancy Guthrie. "In my opinion, her home - this is in no way framing the family - is theoretically an extension of the crime scene because it was the last place that Nancy Guthrie spent time alive," former CIA officer and FBI special agent Tracy Walder exclusively tells Us Weekly. "In my opinion that home should've been treated the same.