R.I. Gen. Laws § 12-17-12: Detention of evidence as to perjury.

If, in any proceeding in which perjury may be reasonably presumed pursuant to § 12-17-11, any papers, books, or documents shall have been produced which shall be deemed necessary to be used in any prosecution for perjury, the court may by order detain them from the person producing them, so long as may be necessary, in order that they may be used in the prosecution.