A Guide for Law Enforcement Officers and Expert Witnesses in Impaired Driving Cases DUI Cops Are Instructed How to Testify   “Always demonstrate how you conducted  field sobriety evaluations. Be certain, however, that you can do in court  all the evaluations you asked the defendant to perform” Just spent some time reviewing what must be the … Continue reading Review: The Criminal Justice System: A Guide for Law Enforcement Officers and Expert Witnesses in Impaired Driving Cases