Mealey's (November 27, 2019, 1:21 PM EST) -- BROOKLYN, N.Y. — Mindful of a new report refuting the validity of firearms toolmark analysis, a New York federal judge on Nov. 26 allowed an expert witness for the government to testify but made clear that the expert cannot opine that a shell found at a crime scene definitively came from the defendant’s gun (United States v. Alonzo Shipp, No. 1:19-cr-29, E.D. N.Y., 2019 U.S. Dist. LEXIS 205397)....