That's not true. I have knowledge of the process. He was their first choice but the AD felt the need to conduct a wider search before finalizing. Hauser, the interim HC (and defensive coordinator), was a finalist.
Secondly, this situation has nothing to do with NCAA violations, etc. There is no vacation of wins -- you know how long it takes the NCAA to conduct investigations. It takes months if not years.
The truth is the coach is embroiled in a very contentious divorce. My (educated) guess is that his spouse has made a claim that is serious enough to warrant investigation by the university. Could be she's being spiteful to try to ruin his career...could be there's some element of truth to it. Will likely know sooner rather than later. In the meantime, they've received all but 2 of their expected letters of intent today.