I agree it is unlikely because in this day and age, if something embarrassing to the university took place, there would be a camera, a disgruntled someone or someone trying to make a buck with a video. Embarrassing never stays quiet.
As far as hiring coaches, what coaches? If they were going to pay him $3 mil to go away in 48 hours, this wasn't about a potential coaching change or a months salary, They could have set an July 31 date, started the process of hiring a new AD, had one in place and had a seamless transfer of power.
I just believe, they either have their guy and have to go through the legal hiring hoops, or the guy they thought they had said no.