Article continues below advertisementWhoever sent the alleged ransom notes related to Nancy Guthrie's disappearance may have referenced Bible writings, according to a former FBI agent's theory. While it remains unconfirmed whether the notes were real, retired special agent Jennifer Coffindaffer speculated that the messages could be "religious" in nature based on the responses from Nancy's daughter Savannah Guthrie."Savannah's outreach to the ransom note writer(s) has been religious," she wrote in an X post on Monday, April 13. "Initially, I thought it was because Savannah was religious.