The local fire marshal shall, in accordance with the provisions of § 29-311, investigate the cause, origin and circumstances of any fire or explosion within his jurisdiction, by reason of which property has been destroyed or damaged, or any person injured or killed, or any incidents which threatened any property with destruction or damage or any person with injury or death by reason of fire or explosion, and shall especially investigate whether such fire was the result of an incendiary device or the result of carelessness, design or any criminal act; and the State Fire Marshal, or the deputy fire marshal under his direction, may supervise and direct such investigation.