N.C. Gen. Stat. § 58-79-5
It is the duty of the Director of the State Bureau of Investigation to examine, or cause examination to be made, into the cause, circumstances, and origin of all fires occurring within the State to which his attention has been called in accordance with the provisions of G.S. 58-79-1, or by interested parties, by which property is accidentally or unlawfully burned, destroyed, or damaged, whenever in his judgment the evidence is sufficient, and to specially examine and decide whether the fire was the result of carelessness or the act of an incendiary. The Director of the State Bureau of Investigation shall, in person, by deputy or otherwise, fully investigate all circumstances surrounding such fire, and, when in his opinion such proceedings are necessary, take or cause to be taken the testimony on oath of all persons supposed to be cognizant of any facts or to have means of knowledge in relation to the matters as to which an examination is herein required to be made, and shall cause the same to be reduced in writing. If the Director of the State Bureau of Investigation or any deputy appointed to conduct such investigations, is of the opinion that there is evidence to charge any person or persons with the crime of arson, or other willful burning, or fraud in connection with the crime of arson or other willful burning, he may arrest with warrant or cause such person or persons to be arrested, charged with such offense, and prosecuted, and shall furnish to the district attorney of the district all such evidence, together with the names of witnesses and all other information obtained by him, including a copy of all pertinent and material testimony taken in the case.
N.C. Gen. Stat. § 58-79-5