It will help but not change a lot of what will go on in court. What you need is a very good attorney that knows the court and DUI laws.
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Everything you can do to show the prosecution that you are taking this seriously , will help you.
NY Criminal defense Attorney
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It will only help in the sense that the court may take any arguments you make towards your commitment to rehabilitation more seriously. However, it has drastically less affect than common sense would tell us it should have. The court focuses on the facts of the incident - not the circumstances after.