A former special agent with the Federal Bureau of Investigation (FBI) is sharing her assessment after investigators revealed new surveillance photos of a potential suspect in Nancy Guthrie's ongoing disappearance. "A couple of things that stand out to me [are] you don't see a vehicle in the background," Tracy Walder, also a former CIA officer, exclusively shared with Us Weekly on Tuesday, February 10. "Whoever got here was either dropped off, which would have been pinged, but either they were dropped off out of the camera's view, they walked there, biked there or whatever.