(NewsNation) — It has now been six months since Nancy Guthrie was believed to be abducted from her home in Tucson, Arizona, and there is new insight into the ransom notes.

On Friday, the Pima County Sheriff’s Department released the full contents of two ransom notes sent to a Tucson television station in connection with the 84-year-old’s disappearance. Authorities released them publicly in hopes someone may recognize the writer’s distinctive linguistic patterns and help identify the individual responsible.

The question that remains is who exactly wrote these notes?

A former FBI profiler and a forensic linguist told NewsNation’s Brian Entin there are three hypotheses.

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James Fitzgerald said he believes the masked man seen on Guthrie’s doorbell camera was involved in the abduction and also wrote the notes for profiting purposes, even though he said it’s rare for that to happen in abductions.

Fitzgerald said his second hypothesis is the masked man did the abduction and wrote the notes, but it was never a legitimate abduction and just a smokescreen to throw off investigators. The third possibility is the masked man had nothing to do at all with the notes.

“It’s possible he did the abduction for whatever reason, and someone else, an opportunist from Tucson or somewhere else in the U.S. or overseas did it,” he added.

Natalie Schilling, the forensic linguist, said one thing that stood out to her in the notes was the switching between using “we” and “me,” and that the switching in language was a sort of slip-up.

“What that suggests to us is ‘we’ is a ruse, and that this is one individual,” Schilling said. “This isn’t somebody who represents some kind of collective.”