A U.S. federal judge threw out a $15 million jury verdict and ordered a new trial in a lawsuit against Ford by a Tulsa, Okla., couple whose son died in a rollover crash in 2003.

U.S. Chief District Judge Claire Eagan said Ford Motor Co. showed in post-trial motions that “it was prejudiced by plaintiffs counsel’s conduct, and the jury’s unprecedented verdict for noneconomic damages supports this conclusion.”