Justice Louis Brandeis Dissenting Opinion in Olmstead V. United States (1928)(law.cornell.edu)
law.cornell.edu
Justice Louis Brandeis Dissenting Opinion in Olmstead V. United States (1928)
https://www.law.cornell.edu/supremecourt/text/277/438#writing-USSC_CR_0277_0438_ZD
The one particular passage that is pretty interesting is as follows:
"The progress of science in furnishing the Government with means of espionage is not likely to stop with wiretapping. Ways may someday be developed by which the Government, without removing papers from secret drawers, can reproduce them in court, and by which it will be enabled to expose to a jury the most intimate occurrences of the home. Advances in the psychic and related sciences may bring means of exploring unexpressed beliefs, thoughts and emotions."