text:  In overturning Chevron, Chief Justice John Roberts says courts should no longer defer to a federal agency's reading of an ambiguous statute. Conservatives have sought this outcome for years, and liberals now worry the ruling could affect thousands of cases in which federal regulators prevailed. Former Uvalde, Texas, school district police officer Adrian Gonzalez is in custody. His indictment in a child endangerment case is connected with the Robb Elementary School shooting. You're listening to ABC News.