When you are facing drunk driving charges, you know there is a lot on the line. Your personal freedom, right to drive and your reputation are all at stake. It is in your interests to fight back with a strong criminal defense strategy, and a good place to start is to look carefully at the initial traffic stop.
Law enforcement cannot pull someone over just because they want to. There must be a clear reason to do so, called reasonable suspicion. When there are no clear legal grounds for a traffic stop, it could invalidate all of the evidence from this interaction. This could invalidate the prosecution's entire case against you. If you believe that there are issues with the traffic stop that led to your arrest, you have the right to challenge it.