Answer: Pre-trial motions are absolutely necessary in any drunk driving case. Those are the motions challenging improper police procedure. Those can be motions challenging the stop by the police of your vehicle, your arrest, your detention. Motions can be filed when an officer fails to turn on his videotaping or audiotaping equipment; motions can be filed if you were improperly advised of your rights under the Implied Consent Law. These are written legal documents pointing out what the police did wrong in your case, and those oftentimes can result in many amendments to lesser charges and straight-out acquittal.