It upheld the principle that states have control of local issues, like gun possession on school grounds. Lopez was charged in a one-count indictment with violating 18 USC § 922(q), which makes it illegal to possess a firearm in a school zone.A case in which the Court found the 1990 Gun-Free School Zones Act unconstitutional for overstepping the congressional boundaries of the Commerce Clause. The Tenth Amendment concerns the relationship between the federal government's powers and those powers reserved to the states. The supreme court sided with lopez in a 5-4 decision and here's the reasoning from the majority opinion. The Act neither regulates a commercial activity nor contains a requirement that the possession be connected in any way to interstate commerce. The Supreme Court decided in a 5-4 decision that Lopez was correct. On March 10, 1992, respondent, who was then a 12th grade student, arrived at Edison High School in San Antonio, Texas, carrying a concealed . The landmark 1995 case centered around 12th-grader Alfonso Lopez. The San Antonio student was arrested for carrying a concealed handgun and bullets to school.