( February 26, 2025, 12:39 PM EST) -- CINCINNATI — A Sixth Circuit U.S. Court of Appeals ruling that expert testimony on causation is not needed in a complex design defect case “misapprehended Kentucky law,” a gun manufacturer argues in a Feb. 25 petition for an en banc rehearing of a recent split decision that found that while a district court properly excluded expert testimony on causation, it erred in excluding design defect testimony and reversed an award of summary judgment....