N.C. Gen. Stat. § 58-79-1
The Director of the State Bureau of Investigation, through the State Bureau of Investigation, the Office of the State Fire Marshal, and the chief of the fire department, or chief of police where there is no chief of the fire department, in municipalities and towns, and the county fire marshal and the sheriff of the county and the chief of the rural fire department where such fire occurs outside of a municipality, are hereby authorized to investigate the cause, origin, and circumstances of every fire occurring in such municipalities or counties in which property has been destroyed or damaged, and shall specially make investigation whether the fire was the result of carelessness or design. A preliminary investigation shall be made by the chief of fire department or chief of police, where there is no chief of fire department in municipalities, and by the county fire marshal and the sheriff of the county or the chief of the rural fire department where such fire occurs outside of a municipality, and must be begun within three days, exclusive of Sunday, of the occurrence of the fire, and the Director of the State Bureau of Investigation, through the State Bureau of Investigation, shall have the right to supervise and direct the investigation when he deems it expedient or necessary.
The officer making the investigation of fires shall forthwith notify the Director of the State Bureau of Investigation, and must within one week of the occurrence of the fire furnish to the Director of the State Bureau of Investigation a written statement of all facts relating to the cause and origin of the fire, the kind, value and ownership of the property destroyed, and such other information as is called for by the forms provided by the Director of the State Bureau of Investigation. Departments capable of submitting the required information by the utilization of computers and related equipment, by means of an approved format of standard punch cards, magnetic tapes or an approved telecommunications system, may do so in lieu of the submission of the written statement as provided for in this section. The Director of the State Bureau of Investigation shall keep in his office a record of all reports submitted pursuant to this section. These reports shall at all times be open to public inspection.
N.C. Gen. Stat. § 58-79-1