The police are not required to provide you with a reason for stopping your car. The police only need to have a reasonable suspicion of criminal activity in order to justify the stop. This is not a very high standard. Police stops have been upheld as legal for reasons such as weaving between the lanes, speeding, making a wide turn, failure to make a complete stop, etc. If you obtain a copy of the police report, you will be able to find out the officer's reason for stopping your car.
An experienced criminal defense attorney will be able to determine if the stop of your car was illegal. If this is the case, your lawyer can file a motion to suppress the use of any evidence seized by the police as a result of the illegal stop. If the suppression motion is successful, the DWI charge against you will be dismissed.
If your car has been illegally stopped for a DWI by the police, contact Robert J. Shane, Esq. for a free phone consultaton at (612) 339-1024 or visit his website at http://www.criminallawyerminnesota.com.