If the victim/witness believes that his/her grand jury testimony may incriminate him/herself, then the witness may decide to assert the right to remain silent to all of the questions asked, or to request and obtain immunity from prosecution as a prerequisite to giving any testimony.
Evidence elicited during the grand jury questioning could be used to develop a case against the victim, so testifying openly, if the victim believes he/she is at risk of prosecution, could be perilous.
Note, also, that there is no right to be represented by legal counsel at a grand jury hearing.
The victim is STRONGLY urged to consult with a criminal defense attorney prior to testifying before a grand jury.
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