Hiding it would work. You just have to make sure you don’t miss any.
As for the danger. There are levels of exposure. You could leak something damning, but that could be played off as a 1 off. You might also be sitting on a huge amount of paperwork that proves it’s endemic. That paperwork might also expose others who wanted things changed, but don’t want to be outed. In this case, an initial leak can test the waters. The additional info can be rolled out, if it’s needed, or the results justified.
E.g. Initial leak proves they did something nasty. The additional info massively backs it up, but also implicates a VP in its gathering. You might not want to show that hand until later, either to protect them, or to gather more info on their reaction.
I strongly suspect all solutions will either be invalid, or be limited to the speed of light.
The universe seems to have a lot of weird quirks (the speed of light being 1) what they have in common is that they make time paradoxes impossible. This points to some deeper physics causing these disparate effects. Anything travelling faster than C can be configured as a time machine, and so create paradoxes.