Fred M. Vinson

“ Since petitioner's claim of privilege cannot be asserted in relation to the books and records sought by the grand jury, the only claim for reversal of her conviction rests on the ground that mere disclosure of the name of the recipient of the books tends to incriminate. ”

“ Requiring full disclosure of details after a witness freely testifies as to a criminating fact does not rest upon a further 'waiver' of the privilege against self-incrimination. Admittedly, petitioner had already 'waived' her privilege of silence when she freely answered criminating questions relating to her connection with the Communist Party. ”

“ The holding of the Michigan court is entirely apposite here: ' (W) here a witness has voluntarly answered as to materially criminating facts, it is held with uniformity that he cannot then stop short and refuse further explanation, but must disclose fully what he has attempted to relate.' 18 Mich. ”