N.H. Rev. Stat. § 417:29
The unit's papers, documents, reports, or evidence relative to the subject of investigation under this section shall remain confidential and shall not be subject to public inspection or disclosure. Further, such papers, documents, reports, or evidence relative to the subject of an investigation under this section shall be privileged and shall not be subject to subpoena, discovery, or disclosure in any proceeding other than the action initiated by the unit, except as specifically authorized in this subdivision. For the purposes of this section, investigative materials shall include the testimony of unit personnel concerning any matter of which they have knowledge pursuant to a pending insurance fraud investigation by the unit.
RSA 417:29
1996, 285:1, eff. Jan. 1, 1997.