Part of the process should be, based on the allegations, a criminal investigation. Part of the process would also be to have never hired this guy back.
The document shouldn't have been leaked, and he is entitled (a fitting word in this case) to the presumption of innocence, and this does need to be treated in accordance with their personnel and human resource guidelines. But the document was leaked, and it alleges criminal misconduct, and it also seems to draw a clear picture of gross negligence and malfeasance.
Their process, especially after Penn State, is flawed. And IMO, typical of an institution where they think they are "smarter" than everyone else. Also typical of government think. They are enlightened I guess.
This guy is entitles to due diligence, and privacy. We are entitled to a criminal investigation. He inappropriately touched those who he was given a position of authority over. His right to privacy is somewhat reduced in a case like this.