What if she mailed it to herself?

What if she put it in a locked box before shipping it to herself UPS, and she has the only key?

What if instead of UPS, she hired a moving company to move the locked box?

What if she wrote it electronically in diary.txt, but it was backed up to a cloud provider?

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I'm guessing there's some sort of "reasonable expectation of privacy" for certain activities. We're going to find out what Florida courts think about this new medium.

We'll only find out what the courts think when this happens to someone with a lot of money. It takes a real legal fight to push it high enough to become precedence. She'll be pushed to plea out.