William O. Douglas,
Communist Party of the United States v…
“ The compiling, the signing, and the filing of the registration statement required of officers, directors, and others by the registration form is a form of elicited testimony, not the surrender of pre-existing records. Where, as here, such disclosure will reveal knowledge of and relations with the Communist Party, I do not see how it can be demanded, unless immunity is granted.The Bill of Rights does not go so far as to forbid all interrogation under threat of punishment. It does not prevent the breaking of myriad bonds of secrecy at the command of the Government. ”
