Courtesy of NBC News Tap Here To Add Us Weekly As A Trusted Source Add as a preferred source on Google A former FBI agent has explained why Nancy Guthrie's home will be returned to her family amid the ongoing investigation into her disappearance, which now includes new Ring camera footage of a car speeding by on the night she went missing. "They feel like they've exhausted [the home] in terms of every single piece of DNA, every single fiber, every single video camera," former FBI Special Agent Breanna Fox said during a segment about the case on the Today show on Friday, February 27.