(NewsNation) — Crime scene investigator Sheryl McCollum doesn’t think the ransom notes tied to Nancy Guthrie’s disappearance are real.

Guthrie, the 84-year-old mother of “Today” anchor Savannah Guthrie, was reported missing from her home near Tucson, Arizona, on Feb. 1.

Investigators have said she was likely taken from her home, possibly overnight, without her shoes or medication. She has not been found.

Nancy Guthrie ransom notes are too polite for a real kidnapper: McCollum

McCollum, a longtime Atlanta-area CSI, told “Jesse Weber Live” the note’s tone was an early red flag. “It starts with a greeting, ‘hello, Savannah.’ That’s not a demand. That’s not urgency,” McCollum said.

She said the note spells out details a real kidnapper would not bother explaining, like reassuring the family she is safe but scared.

“You go on to explain more things that are obvious,” McCollum said. “But if this was a demand for money, that doesn’t even play into what you’re doing.”

McCollum said the bigger problem is physical evidence the note ignores. She wants investigators, and whoever wrote the note, to account for blood found on the front porch, not just items recovered in the backyard.

“If everything you did was in the back, how did her blood get on the front porch?” she said. “Explain that.”

The note also was not sent until 48 hours after Guthrie went missing, gave two separate deadlines and two different ransom amounts, and specified the money should be paid in U.S. currency, details McCollum said do not match how a genuine ransom demand works.

“This gives you two different deadlines to give money, gives you two different amounts. That’s not a ransom note,” she said.

Second ransom note claimed Nancy Guthrie was ‘buried in nature’

A second note, which surfaced later and appeared to be an apology claiming Guthrie died, struck McCollum as similarly hollow. It said she died “buried in nature.” “Everybody’s buried in nature. If you’re buried, you’re in nature,” McCollum said. “It just does not ring true to me.”

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McCollum said the FBI is still working to track down whoever wrote the notes and is scrutinizing the same inconsistencies, including the delayed delivery and the odd ransom figures.

She said releasing the notes publicly, if they turn out to be real, could complicate the investigation and hurt the family.

You can read the full contents of the ransom notes here.