I think when the guy was told to cought up the emails he went back and directed the IT department to delete them.
I'd be willing to bet money they were never deleted.
he could do some serious jail time for destruction of evidence in a federal investigation.
As much as this kind of "s**t" continuously happens all throughout government, the above kind of things never happen. Unfortunately too, they most likely never will. The IRS is a private entity and can claim any number of things. Unless the Senator gets a warrant to seize servers by surprise (which is seriously doubtful), nothing will happen and this hearing will fade into an afterthought, like many before and many to follow.
Murica!