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46 S. Tex. L. Rev. 111 (2004-2005)
Sobering up Daubert: Recent Issues Arising in Alcohol-Related Expert Testimony

handle is hein.journals/stexlr46 and id is 127 raw text is: SOBERING UP DAUBERT: RECENT ISSUES ARISING IN ALCOHOL-RELATED EXPERT TESTIMONY KIMBERLY S. KELLER* I. INTRO D UCTIO N ............................................................................ 111 II. ALCOHOL & ITS EFFECTS ON THE BODY ................................. 114 III. DEVELOPMENT OF THE GATEKEEPER ..................................... 115 A . F ederal .................................................................................... 115 B . T exas ....................................................................................... 118 IV. ALCOHOL RETROGRADE EXTRAPOLATION ........................... 120 A . B A C C urve ............................................................................ 121 B. Absorption Rate: Distinguishing Between General & Specific Extrapolation .......................................................... 122 1. Flaws in General Retrograde Extrapolation ................. 124 2. Ensuring the Reliability of Specific Retrograde Extrapolation ................................................................... 127 3. Effects on Expert Alcohol Extrapolation in Civil C ases ................................................................................. 128 V. EFFECT OF EXCLUDING EXTRAPOLATION TESTIMONY ON ADMISSIBILITY OF BAC TESTS .................................................. 129 A. Rule 403 Challenge to BAC Test Results ............................ 130 B. Legal Sufficiency Challenge to Jury Charge on Per Se Definition of Intoxication ..................................................... 130 VI. LEGISLATIVE SOLUTION: ENACT A PRESUMPTION OF INTOXICATION BASED ON A BAC TEST GIVEN AFTER TH E STO P ....................................................................................... 133 V II. C ONCLUSIO N ................................................................................ 134 I. INTRODUCTION In February 2004, prosecutors let out a collective sigh of relief as the Texas Court of Criminal Appeals reaffirmed one of the criminal justice system's most formidable weapons in driving while intoxicated (DWI) trials.' This weapon was issued to most prosecutors * J.D., St. Mary's University School of Law; B.A., University of Texas at San Antonio; Assistant Professor of Criminal Law, Criminal Justice Department, University of

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