Who knows something?
Could someone have seen a vehicle, heard a conversation or noticed something unusual without realizing its importance?
Investigators have repeatedly emphasized the importance of even seemingly insignificant information.
The Tucson Community Remains Involved
Nancy's disappearance has also affected the community where she lived.
The Tucson area became the center of a major search operation after her disappearance, with investigators examining the neighborhood and surrounding areas.
More recently, investigators returned to the area around Nancy's home, according to local reporting. The renewed activity came months after the initial searches and demonstrates that authorities have not simply abandoned the physical evidence associated with the case.
The landscape itself can present challenges.
Arizona's terrain is vast, and seasonal weather can alter the environment.
That makes every search dependent on careful planning, available evidence and information about where investigators should concentrate their efforts.
A single credible tip can potentially change the direction of an investigation.
