1) Retain an attorney. Your lawyer will know the legal issues involved in DWI/DUI law and how to best handle the case.
2) Request discovery. Your lawyer will request discovery from the prosecutor and analyze it for any deficiencies that may help your case. Discovery consists of the police reports, Alco Test results and calibration logs, drug lab reports or anything else that is relevant to your case.
3) Meet with your lawyer. You should schedule a meeting with him or her before court to review the discovery and explain your recollection of the case. That way, your attorney may find discrepancies between your version of events and what the police say happened.
4) Hire an expert witness. You and your attorney may decide to hire an outside expert witness to review the Alco Test results or lab reports. If an expert is able to identify any flaws in the discovery, this may help your case a great deal.
5) Go to court. At the court date, your attorney will raise any issues with the prosecutor and judge. This might get your case dismissed before trial.
6) Have a trial. In the most serious cases, a trial may be necessary to fight your charge. This may occur when the prosecutor does not want to dismiss the case, but instead wants to hear testimony from the police and the expert witness, if you have hired one. Your attorney will cross-examine the police and illicit testimony from the expert to best defend your case. After the testimony is finish and all legal arguments are made, the judge will make his or her ruling.