After nearly a month of searching for Nancy Guthrie, the Pima County Sheriff’s Department says it is adjusting how resources are allocated in the ongoing investigation.

In an update on Friday, Feb. 27, the Pima County Sheriff’s Department said, “This remains an active investigation and will continue until Nancy Guthrie is located or all leads have been exhausted.”

The department, it went on, “is refocusing resources to detectives specifically assigned to this case. As leads are developed and resolved, resource allocation may fluctuate. PCSD will maintain a patrol presence in the Guthrie neighborhood.”

The sheriff’s department did not provide details about how it plans to refocus its resources as the search continues for the 84-year-old mother of Today show co-host Savannah Guthrie.

The department did say that investigators are “actively reviewing surveillance video of vehicles traveling in the Catalina Foothills area, including areas farther from the Guthrie residence.”

The update comes after news this week that a couple who live on a back road about 2.5 miles from Nancy’s home released new footage, obtained by Fox News, showing a car speeding down the road minutes after police believe she was abducted.

One of the videos the couple released was recorded at around 2:36 a.m. on Feb. 1, about eight minutes after Nancy’s pacemaker last synced with her iPhone, according to the sheriff’s timeline.

Nancy’s doorbell camera was disconnected at 1:47 a.m., local time. Then, a dark figure was detected on the camera at 2:12 a.m. Sixteen minutes later, at 2:28 a.m., Nancy’s pacemaker was disconnected from the pacemaker app on her cellphone, authorities previously said.

The Pima County Sheriff’s Office told Fox News and NBC News they are aware of the newly released Ring camera footage, but didn’t say whether the footage will help the case.

Nancy’s family called 911 at 12:03 p.m. local time on Feb. 1 to report her missing after she failed to join friends to watch a virtual church service.

The mother of three was last seen going into her garage at 9:50 p.m. on Saturday, Jan. 31, after having dinner at her daughter Annie’s nearby home.

On Feb. 16, Pima County Sheriff Chris Nanos said “The Guthrie family — to include all siblings and spouses — has been cleared as possible suspects.”

One of the biggest moments in the case came on Feb. 10, when authorities released surveillance photos and video footage of a masked man carrying a gun on Nancy’s front porch on Feb. 1.

The FBI Phoenix office described the suspect as “a male, approximately 5’9” – 5’10” tall, with an average build. In the video, he is wearing a black, 25-liter ‘Ozark Trail Hiker Pack’ backpack” that may have been purchased at Walmart.

The identification of the backpack is one of the most promising leads authorities have had so far, said Nanos.

Since their mother went missing, Savannah and her siblings have been waiting for any word about what happened to her and why.

On Feb. 16, Savannah released an emotional new video saying the Guthrie family is offering up to a $1 million reward for any information leading to Nancy’s recovery. The family is also donating $500,000 to the National Center for Missing and Exploited Children.

The FBI’s $100,000 reward for information remains active.