To declare that in the administration of criminal law the end justifies the means to declare that the Government may commit crimes in order to secure conviction of a private criminal would bring terrible retribution.
Louis D. BrandeisExperience should teach us to be most on our guard to protect liberty when the Government's purposes are beneficent. Men born to freedom are naturally alert to repel invasion of their liberty by evil-minded rulers. The greatest dangers to liberty lurk in the insidious encroachment by men of zeal, well meaning but without understanding.
Louis D. BrandeisThe progress of science in furnishing the government with means of espionage is not likely to stop with wire tapping. Ways may some day 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. 'That places the liberty of every man in the hands of every petty officer' was said by James Otis of much lesser intrusions than these.
Louis D. Brandeis