The Supreme Court has ruled in a 6-3 decision to uphold the conviction of a California woman, Delilah Guadalupe Diaz, who was found with a stash of methamphetamine hidden inside her car. The majority opinion dismissed arguments that an expert witness for the prosecution had overstepped in describing the woman's mindset, stating that the opinion about most drug couriers did not apply to all couriers.
Justice Clarence Thomas, writing the decision, was joined by Chief Justice John Roberts, Justices Samuel Alito, Brett Kavanaugh, Amy Coney Barrett, and liberal Justice Ketanji Brown Jackson. In a dissenting opinion, Justice Neil Gorsuch expressed concern that the ruling could give the government excessive power by allowing expert witnesses to speculate on a defendant's mental state.
