Diener has no rep as far as I know, but JSOnline says that Diener decided against the Grafton job in June and accepted a teaching job at Hamilton soon after. He did not accept the coaching job until today, but the previous coach had verbally quit in May.
JS Online: NewsWatch
It may be nothing, but it is going to be something that will be looked a lot further into.
Edit to add: The reason for accepting the Hamilton job makes perfect sense, since he lives in Oak Creek and Hamilton is on the south side.