(Nathan Congleton/NBC via Getty Images)

Today co-anchor Savannah Guthrie‘s mom, Nancy Guthrie, is still missing weeks after the abduction from her Tucson, Ariz., home—and a retired FBI agent shared a search map that reveals why the suspect’s car still hasn’t been identified.

On Sunday, March 15, Jennifer Coffindaffer, a former special agent, took to X with a photo of a map reportedly shared by Nancy’s daughter, Annie Guthrie, per investigative reporter Jonathan Lee Riches.

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“I am all over this map,” Coffindaffer captioned her update. “JLR says Annie Guthrie had a group chat with neighbors and sent this map out to them at the beginning of the investigation hoping they may have seen something or may have video. Makes sense. Annie grew up there and still lived only 4 miles away.”

She continued, “Annie was desperate for answers. This is very usual with family members. Most importantly, this route is so desolate. Few lights. Few houses that aren’t offset. No traffic lights. The perfect path to get out of that neighborhood unseen if your car lights were off, especially. ”

To conclude the post, Coffindaffer pointed out, “This could explain why no car has been identified yet.”

Related: Nancy Guthrie Update: “Prime-Time Rapist” Terrorized Same Tucson, Ariz., Neighborhood 40 Years Before

On March 10, Coffindaffer touched on a different aspect of the 84-year-old’s missing case—specifically, about Pima County Sheriff Chris Nanos.

“Wondering why Sheriff Nanos keeps turning away proven very capable civilian search experts like EquuSearch and the real Cajun Navy?” she wrote, of Nanos rejecting search plans from the United Cajun Navy as the search for Nancy continues.

The retired FBI agent then speculated, “Is LE [law enforcement] close to an arrest and they know what happened to Nancy so they don’t want to waste the valuable resources of these groups? But why won’t the sheriff at least acknowledge these groups? Half glass full. Hoping LE is getting closer.”

Nancy was last seen at her Catalina Foothills home on the evening of Jan. 31. On Feb., the PCSD officially launched its search for her. No suspect has been named as the investigation continues.