Who says they're not? Who says investigators don't have the smoking hot evidence that CAN convict Obama?
Who says there aren't investigators out there that Obama's corruption money can't influence, buy---or even find WHO these intensely driven investigators are, for that matter? And Obama IS REALLY a fool IF he isn't aware THEY ARE on to him.
Albeit possible Obama has hired some 5-star "cleaning" people, it IS sociologically factual that NO ONE can TOTALLY eliminate damming evidence against ANY criminal.
Own the smoking evidence and you OWN Obama.
Currently, Obama is a successful man. The political success of ANYONE is measured by the MAJORITY of people, who simply LIKE you; piss them off however, and you wind up like Epstein.
Oh, and nevermind those NDA's the Obamas demand their staff sign; I'm quite sure there are A LOT of discreet "leaks" from the "inner circle" of Obama Castle. You simply don't know who you can trust in Washington D.C. anymore!!
All in due time; Obama can't keep pleasing the "friends" that keep him walking free forever.