Mealey's (November 12, 2020, 1:19 PM EST) -- NEW ORLEANS — A Louisiana federal judge on Nov. 9 granted in part and denied in part a motion to exclude expert testimony in a vehicle crash lawsuit, ruling that the expert may testify on the biomechanics of the collision but cannot opine on medical causation (Rokedrick Williby v. National Casualty Co., et al., No. 19-13357, E.D. La., U.S. Dist. LEXIS 209031)....