A federal judge ruled on Monday that some of the tactics employed by the St. Louis police force in Ferguson against demonstrators were unconstitutional. U.S. District Judge Catherine Perry issued a preliminary injunction ordering the St. Louis police force to stop its blanket use of the “keep-moving rule”—also known as the “five second rule”—that required protesters to continue moving during demonstrations or face arrest. “Neither the public interest nor the interests of the [police] favor restricting the core constitutional rights of assembly and speech in the arbitrary and vague manner caused by the keep-moving rule,” the order reads.