Here are some cases of interest on the subject:
Luria v. United States, 231 US 9 - Supreme Court 1913 http://scholar.google.com/scholar_c...S.D.N.Y.+1976).&hl=en&as_sdt=3,33&as_ylo=1992
United States v. Ginsberg, 243 US 472 - Supreme Court 1917 http://scholar.google.com/scholar_c...S.D.N.Y.+1976).&hl=en&as_sdt=3,33&as_ylo=1992
Tutun v. United States, 270 US 568 - Supreme Court 1926 http://scholar.google.com/scholar_c...S.D.N.Y.+1976).&hl=en&as_sdt=3,33&as_ylo=1992
Each of these cases have a ton of links to many more cases. Enjoy!
Luria v. United States, 231 US 9 - Supreme Court 1913 http://scholar.google.com/scholar_c...S.D.N.Y.+1976).&hl=en&as_sdt=3,33&as_ylo=1992
United States v. Ginsberg, 243 US 472 - Supreme Court 1917 http://scholar.google.com/scholar_c...S.D.N.Y.+1976).&hl=en&as_sdt=3,33&as_ylo=1992
Tutun v. United States, 270 US 568 - Supreme Court 1926 http://scholar.google.com/scholar_c...S.D.N.Y.+1976).&hl=en&as_sdt=3,33&as_ylo=1992
Each of these cases have a ton of links to many more cases. Enjoy!