Shortly before dawn in the Catalina Foothills, the streets are usually so still you can hear the desert waking up. On 1 February, that silence hid something far darker. At around 1.47am, outside an 84‑year‑old woman's front door, a masked figure appeared on camera, fiddling with the lens, then slipping back into the night.

By the time the sun came up, Nancy Guthrie – mother, grandmother, and the mum ofTodayco‑anchor Savannah Guthrie – was gone.

What began as a local missing‑person appeal has quickly hardened into one of the most disturbing crime stories in the US this year. And now, for the first time, detectives have someone in custody.

On Tuesday night, after nearly two weeks of searching, the Pima County sheriff's office confirmed that a person of interest had been taken into custody in connection with Nancy Guthrie's disappearance.

According to NBC News, deputies – working with theFBI– pulled over a vehicle during a traffic stop south of Tucson. Whoever was inside did not simply receive a ticket and drive away. They were detained and taken in for questioning. At almost the same moment, officers executed a court‑authorised search at a property in Rio Rico, a small community roughly 60 miles further south, close to the Mexican border.

For now, that is where the certainty ends. Investigators have not released the person's name, age, or relationship, if any, to Guthrie. They have not said whether this is the same individual seen in the grainy surveillance footage outside her home in the early hours of 1 February, dressed in dark clothes, carrying a backpack, face hidden by a ski mask and what officers believe may have been a weapon.

Crucially, detectives stress that the detained individual has been brought in for questioning, not charged. This is not yet an arrest. Behind the scenes, however, no one is pretending this is routine. For the first time since Guthrie vanished, the sprawling investigation has narrowed its focus to a single person.

It is an important shift in tone. The case has already drawn in local deputies, federal agents, forensic specialists and data analysts, all trying to piece together what happened in those missing hours.

One piece of evidence is not in doubt. Blood found on the pensioner's porch has been confirmed as Nancy Guthrie's through DNA testing. That single fact has shaped the way detectives talk about the case: they are no longer dealing with a retiree who wandered off, or a voluntary disappearance. They believe she was taken – and taken violently – from her own home.

The outlines of that night are as chilling as they are incomplete. Guthrie was last seen alive at home in the Catalina Foothills, an affluent area on the edge of Tucson. When she failed to arrive for a planned church visit later that morning, her family raised the alarm. Very quickly, the assumption shifted from confusion to fear.

Source: International Business Times UK