You are facing the revocation of your driving privileges and several class A misdemeanors, each of which carries the possibility of jail time. A second DUI mandates that you either perform a significant amount of public service or serve time in jail. How can you minimize the consequences? 1) Hire the best lawyer you can find and 2) Get yourself into some sort of treatment program.
As a former SLS intern I can say that the legal assistance you receive through student legal services is generally very competent and qualified, particularly when it comes to citations commonly given to students, such as underage drinking tickets. That said, it can be a significantly different experience than hiring your own attorney. If you feel you need someone with a lot of experience or any other particular qualifications, you can and should hire an attorney. If you feel you cannot afford...
When cases are charged as felonies, the underlying misdemeanor charges are dismissed as a formality. If that is what has happened, then it is highly unlikely that your case will be dismissed. You need an attorney as soon as possible. Aggravated DUI can be charged in a number of different ways depending on the circumstances of the case. Do not post the details on this forum. Instead, speak to several attorneys and hire the one with whom you feel most comfortable. Best of luck to you.
If you were arrested and a complaint was made, then most likely you will be charged. The time to speak to a lawyer is now, before the charges have been filed. This will give your attorney time to sit down with you, review the situation, and try to work to resolve the situation before it escalates or worsens.
The State can choose either to prove that you were under the influence of alcohol and it impaired your driving or that your BAC was .08 or greater while you were driving. It is doubtful that you will go to jail, but a good attorney can explain your options and the likely outcomes of your case. Most attorneys, including many of the ones listed here, offer free consultations. You should speak to one as soon as possible.
Unfortunately, your PO doesn't necessarily have sole discretion about whether your probation is revoked. It's a good instinct to try to retain counsel at this point in time. Try Avvo's Find a Lawyer feature or search for attorneys in your area.
On the most serious charge (aggravated DUI resulting in death) your brother faces 1-12 years (assuming only one fatality). He will not be eligible for good time credit, meaning he will serve 85% of his sentence, and probation will not be available unless the judge finds very special circumstances. He needs to hire a very good defense attorney immediately.