That program seems to have ended. If you were able to take advantage of it that's great.

https://www.facebook.com/permalink.php?story_fbid=401855099889936&id=128098500591417

The current Wayne County prosecutor's website makes no mention of expungement when talking about the diversion program. It does say cases are dismissed if the program is completed - unlike what happens in Illinois.

http://www.waynecounty.com/prosecutor/359.htm

Point: expungement of one's criminal record to remove a case where the person was found guilty or plead guilty is not guaranteed and can be cumbersome. Considering this I think we should work to limit kids' exposure to the criminal justice system by avoiding arrest and criminal charges for bad behavior in school except in the most extreme circumstances.