Noun
an exemption that displaces the privilege against self-incrimination; neither compelled testimony or any fruits of it can be used against the witness who therefore can no longer fear self-incrimination
Source: WordNetBut even before that, in 1980 I went so far as to write a book about what had happened. And I wrote all about the bank robbery, I went ahead and printed it even though I had no use immunity for it. Patty Hearst