A good DUI lawyer could help his client prove in court that he is not guilty of the offense. If not, he should be able to reduce the penalties that the client will receive. A dui attorney cannot produce miracles. This means that if you did something punishable because of your intoxicated state then you cannot get out of the situation without facing any form of penalty. What he can do is to prevent you from getting over penalized or he could reduce the charges that will be filed to you. A good DUI lawyer could also present useful evidences in court that could help you to prove your innocence. Some DUI lawyers will teach their clients on how to answer questions. Most of them will advice their client not to feel so stressed out when answering questions. Getting stressed easily is a sign of an alcoholic hence one should avoid showing this in court.