A case in which the Court found the 1990 Gun-Free School Zones Act unconstitutional for overstepping the congressional boundaries of the Commerce Clause. Defendent was charged with violating the Gun-Free School Zones Act of 1990, which prohibited the carrying of firearms in school zones.In a five-to-four decision, the Supreme Court agreed with Lopez and struck down the law. He has the right to the effective assistance of counsel and to confront witnesses against him under the 6th. Amendment. The Santa Clara County District Attorney's Office (hereafter. "Amicus") initiated prosecution of Defendant and Respondent Duvanh. Alfonzo Lopez, a 12th grade high school student, carried a concealed weapon into his San Antonio, Texas high school. United States Court of Appeals, Ninth Circuit. Trump, No. -cv-00574-WHO, (N. Vacate and supporting documents filed in the Superior Court of the State of.