Have any trial lawyers out there tried using Daubert to exclude an expert/analyst from testifying with regard to retrograde extrapolation in a DUI trial? Based on the scientific nature of the calculation and the fact that most analysts don't have the required information to conduct an accurate backwards calculation? There are several state supreme courts (TX - Mata, NM, NV and a few others) that have recently determined that without knowledge of type, size of drinks, duration, food consumption, whether the defendant is absorptive, post, etc an accurate retrograde extrapolation cannot be performed. Has this been attempted in AZ since we adopted Daubert? A local police officer said if there was injury they take multiple breath samples to establish pre or post absorption.