Silverthorne Lumber v. United States, 251 U.S. 385 (1920).
caselaw.lp.findlaw.com
United States v. Hubbell, 530 U.S. 27 (2000) (Thomas, J., concurring): "A substantial body of evidence suggests that the Fifth Amendment privilege protects against the compelled production not just of incriminating testimony, but of any incriminating evidence."