You keep undermining your own argument. Either you think it was confidential or not. If it's not confidential, then there's no problem here.
Secondly, show me where Sheriff Joe gave his official permission to use the information for a book.
It's my understanding that Sheriff Arpaio wrote the foreword for the book.
When police update ongoing investigation do the public they do not give out details and findings. Lawyers spend a lot of time making vetting what gets released so that the final investigation is not compromised.
But why are we arguing - it was not a real investigation. The fact that Sheriff Joe wrote the forward to the book proves that - interesting to know what his under the table cut is.