N.H. Rev. Stat. Ann. § 604-A:1

The purpose of this chapter is to provide adequate representation for indigent defendants in criminal cases, as a precondition of imprisonment, and indigent juveniles charged with being delinquent in any court of this state. Representation of juveniles shall include all court ordered representation and shall be paid from funds appropriated for indigent defense pursuant to this chapter. Representation shall include counsel and investigative, expert and other services and expenses, including process to compel the attendance of witnesses, as may be necessary for an adequate defense before the courts of this state.