The U.S. Court of Appeals for the Ninth Circuit ruled in United States v. Dreyer that an agent for the Naval Criminal Investigative Service violated Defense Department regulations and the Posse Comitatus Act when he conducted a surveillance operation in Washington state to identify civilians who might be sharing illegal files. The 1878 Act prevents the U.S. military from enforcing laws against civilians. The appeals court ruled that the NCIS intrusion into civilian networks showed “a profound lack of regard for the important limitations on the role of the military in our civilian society.” The court also ruled that the evidence obtained by NCIS should be suppressed to “deter future violations.” In a petition to the Supreme Court, EPIC challenged the NSA’s surveillance of domestic communications. The NSA is a component of the Department of Defense. For more information, see In re EPIC and EPIC v. DOJ: Warrantless Wiretapping Program.