Retired investigator Lisa Miller says comma splices and open compounds in the Nancy Guthrie ransom notes reveal the author's unique idiolect.
https://www.foxnews.com/us/nancy-guthrie-ransom-notes-contain-repeated-writing-quirks-could-help-identify-suspect-expert-says
https://www.foxnews.com/us/nancy-guthrie-ransom-notes-contain-repeated-writing-quirks-could-help-identify-suspect-expert-says