The parking lot outside a Hobby Lobby on Oracle Road does not look like the start of a major criminal investigation. It appears more like a Saturday errand run — until the number of cameras pointed at the desert becomes apparent.

That was the scene, according to Fox News Digital correspondent Michael Ruiz, when volunteer searchers gathered on Feb. 22 to fan out across Tucson's rough edges in the hunt forNancy Guthrie — 84 years old, reported missing on Feb. 1, and the mother ofTodayanchor Savannah Guthrie.

The state's Safe Alert notice says family members found her gone from her home, with her wallet, cellphone and vehicle left behind, along with daily medications — details that make the case feel less like a headline and more like a clock ticking in real time.​

Nancy Guthrie is still missing; authorities say DNA work is ongoing; and law enforcement has asked the public to submit relevant home video from near her Catalina Foothills neighborhood rather than flooding the search area.​

Ruiz's posts included a peculiar instruction from organisers, relaying what they said came from authorities: do not bring black gloves. On its face, it sounds petty — like the kind of oddly specific rule that invites mocking replies online. However, it is also grimly logical.

If an item might be evidence, police need to document who handled it, when, and how it was preserved. The more strangers rummaging through brush wearing gloves resembling those a suspect might have worn, the easier it becomes to obscure the story of an object — where it came from, whether it was moved, whether it was planted, or whether a well-meaning volunteer accidentally 'cleaned' away the only useful trace.

Authorities are warning volunteer search groups to stay off Nancy Guthrie's property and give investigators space after unauthorized searchers recovered a glove and backpack near her home.https://t.co/5gHlRFzMVh

These deputies are looking for those women who were poking around with a shovel on the property.https://t.co/gLKyAwW9xY

Pima County Sheriff's Department has been blunt about private search parties, saying volunteer groups were asked 'to please give investigators the space they need to do their work' and that 'this work is best left to professionals.' In other words, those who wish to help should not turn a crime scene into a crowd scene.

Tucson is not a neat grid of streets leading politely to answers. Catalina Foothills — where Guthrie was last known to be — is an affluent area against desert terrain that can swallow objects, footprints, even time. It is also the kind of landscape that invites the modern temptation, if officials will not say much, people will seek their own narrative.

Source: International Business Times UK