If you have an attorney, you should bring this to his/her attention immediately, as the alteration may have tremendous bearing upon the credibility or lack thereof of the arresting officer, both at the APS hearing which the DMV will conduct, as well as in the court.
Your son has a claim for Assault and Battery. You will need to hire an attorney and make an application to be appointed gaurdian ad litem, and then you can prosecute your son's personal injury claim. Consult with a local Personal injury lawyer in your area who has experience representing minors.
Without injuries, the DA's office will want you toserve the equivilant of at least 10 days of jail . You could apply to do the time on a jail alternative such as SWAP (i.e., clean up crew). With injuries to others and/or if you have a prior criminal/DUI history, then the DA will want you serve considerably more jail time and possibly even state prison. If the injuries were even a little bit serious, you would be facing felonies, not misdemeanors. Probation is typically for 3 years and the fine...
Blood Alcohol levels are constantly changing. They go up in a non liniar progression and then you get to your plateau which is short lived (usually 5 - 15 minutes) and then they go down in a liniar progression at an average rate of 0.015% per hour. It is generally impossible to plot a BAC to an earlier time from a single chemical test result. The attempt to do so is called "Retrograde Extrapolation" and is "A very dubious practice" according to Dr. Allen W. Jones, one of the leading...
When your brother goes to court on his very first court date, he can make application for a court appointed attorney. However, he has only 10 days from the date of arrest to request a hearing with the DMV, and the Public Defender will not help him with that case. He would be well advised to contact and retain an experienced Bay area DUI attorney.
Contact the attorney who handled your case in court and ask the lawyer to go to court and request an extension for you to complete your community service hours. This request will have the greatest success if it is made early.
If you don't have an attorney, search for a good San Diego DUI attorney on AVVO.
A Reckless Driving Conviction can be either a Non Alcohol Related or "Dry" Reckless which would stay on your driving record as two points for 3 years, or it could be an Alcohol Releated or "Wet" reckless, in which case the points will stay on your record for 3 years, but the offense will stay on your record as a chargable prior alcohol conviction for 10 years (and that length of time could be changed to a longer time without your consent by a change in law, as has happened several times in the past.