EPIC filed a "Friend of the Court" brief in the Fifth Circuit urging the court to uphold Fourth Amendment protections for cell phone users. In the case, In re US for Historical Cell-Site Data, the lower court held that the disclosure of historical cell phone location records without a warrant would violate the Fourth Amendment. EPIC argued that this opinion should be upheld in light of the Supreme Court's recent decision in United States v. Jones, because cell phone location records are collected without the knowledge or consent of users. The records in this case, EPIC argued, create a "comprehensive map of an individual’s movements, activities, and relationships, . . . precisely the type of information that individuals reasonably and justifiably believe will remain private." For more information, see In re Historical Cell-Site Location Information, EPIC: State v. Earls, and EPIC: US v. Jones.