The authors of the Fifth Amendment intended the provisions in it apply only to the federal government. Since 1925, under the incorporation doctrine, most provisions of the Bill of Rights now also apply to the state and local governments. Since the landmark decision Miranda v. Arizona, 384 U.S. 436 (1966), when they arrest someone, police are required to include the "right to remain silent" as part of the legal Miranda warning (the wording may vary).