As the search for Savannah Guthrie's missing mom, Nancy Guthrie, approaches its third week, one former sergeant is providing an expert opinion on what could come next. "The best-case scenario is they obviously find her alive," Troy Hillman, retired cold case homicide sergeant with the Phoenix Police Department, exclusively told Us Weekly on Wednesday, February 18. "And they've got the bad guy and everybody can go home and it'll take years to go to trial." One possible way to get answers and bring justice is through DNA.