The chief, or such other persons as he shall designate, shall, after extinguishing a fire, make a prompt and thorough investigation of the cause of the fire, the time the fire began, the amount of loss and insurance, a description of the affected buildings and premises, and shall secure all other useful information available, and record the same in a record book kept for the purpose in the office of the department and shall report the same to the government body at such time as it may direct.
(Code 1986 § 10-136)