One thing I would guess about the Clintons is that they probably are smart enough not to have left much of a trail of really hard evidence. The dems. who sneer "prove it" about every evil and/or felonious action the Clintons take would make a Clinton hung jury a victory for the Clintons. This is sad, but I believe it is true, at least right now.
The phrase that comes to mind is "there's not one SHRED of evidence". . .Well of course NOT, they even burned the shredded paper!