N.H. Rev. Stat. Ann. § 516:7-a

If a victim/witness advocate is called as a witness, a party opposing such action may move for an order requiring the party desiring to use such testimony to show cause why such victim/witness advocate's testimony is necessary. In no case shall a victim/witness advocate be sequestered unless the court finds and orders, based on the facts of the case, that failure to sequester would violate a defendant's rights.