Whether district courts have a duty to assess the reliability of law enforcement officers testifying as experience-based experts

QUESTIONS PRESENTED Whether district courts, serving as Daubert/Kumho Tire gatekeepers, have a duty to assess the reliability of law enforcement officers testifying as experiencebased experts, rather than rely on their qualifications alone, before allowing them the wide latitude afforded to experts testifying to a jury? Whether Congress violated the Commerce Clause and the Tenth Amendment when it criminalized purely intrastate drug transactions on the basis that at some historic point, those drugs had crossed state lines? i PARTIES AND CORPORATES DISCLOSURE STATEMENT All parties appear on the caption of the title page. Petitioner Jaime Calderon was the defendant in the United States District Court for the District of Arizona, and Appellant in the case before the United States Court of Appeal for the Ninth Circuit. The United States was the plaintiff in the District Court, and Appellee in the case before the Ninth Circuit. No corporate entities have any interest in this case. ii STATEMENT OF