Seems like they are so foul that if they didn't like a document they found at Cohen's they would just destroy it?
They forge documents! [The interview form of Strokz for Flynn, was "changed" so it wouldn't match the answers he gave later.!]
In law, once fraud is found, it destroys all the rest.
They may want to hide the fraud "for the good of the county" but whatever they do should not be taken seriously, ever.