Police respond to scene of collision where driver struck parked vehicle and then drove short distance down road before stopping. Responding officers note odor of alcohol, slurred speech and that driver is unsteady on his feet. Despite heavy vehicle damage from impact driver refuses medical attention. He further refuses to answer questions or to participated in field sobriety tests and a post arrest breath test. After he is released the driver is examined and diagnosed with concussion. Evidence of refusal and silence are inadmissible at trial in Massachusetts. Defense utilizes Emergency Room Medical Doctor as expert witness to describe symptoms and effect of concussion, to include unsteadiness, confusion and amnesia. Not Guilty verdict following trial on OUI Charge.