Sounds like he did report you to the police and they will be charging you. Dont send any letter or speak to anyone without the presence of an attorney. Hire the best criminal defense attorney you can afford as soon as possible to mitigate the consequences.
No way to keep this off your record besides fighting it at trial. Contact a criminal defense attorney to determine if the police used the proper procedure for the stop and search and whether you have a defense.
You need to hire the best criminal defense attorney that you can afford. A reading of .08 is the legal limit in the State of Michigan, and these cases can be fought and won due to the margin of error associated with the machine used to determine the blood alcohol level. Spending the money a a good attorney will be priceless for your son's future. Make sure the attorney you hire is familiar with and understands the science behind measuring blood alcohol levels.
I agree. It will be on your record until you finish the 6 months of probation without any violations. If you do not violate that terms of your probation, then the record will reflect that the case was dismissed.