The Supreme Court upheld the prior rulings in the case, holding that the wiretaps were an unconstitutional violation of the Fourth Amendment and as such must be disclosed to the defense. This established the precedent that a warrant needed to be obtained before beginning electronic surveillance even if domestic security issues were involved. Note that the decision applied only to domestic issues; foreign intelligence operations were not bound by the same standards. The governing law for electronic surveillance of "foreign intelligence information" between or among "foreign powers" is the Foreign Intelligence Surveillance Act (FISA) of 1978.
"Hugh M. Davis Jr. Papers" (PDF). Walter P. Reuther Library, Wayne State University. Retrieved December 11, 2015. http://reuther.wayne.edu/files/UP001881.pdf ↩
Conyers, John (May 14, 2003). "Damon Keith -- Guardian of the Constitution". Congressional Record: E960 – E961. Retrieved December 11, 2015. http://www.fas.org/irp/congress/2003_cr/s051503.html ↩
United States v. Sinclair, 321 F. Supp. 1074 (E.D. Mich. 1971). https://law.justia.com/cases/federal/district-courts/FSupp/321/1074/2597112/ ↩
United States v. United States District Court, 444 F.2d 651 (6th Cir. 1971). https://law.justia.com/cases/federal/appellate-courts/F2/444/651/340959/ ↩