SDCL § 34-29B-8: Fire marshal to investigate circumstances of fire or explosion.

The state fire marshal may investigate the cause, origin, and circumstances of fire or explosions by which property has been destroyed or damaged and, attempt to determine whether the fire or explosion is the result of carelessness or design. The state fire marshal may take charge of the physical evidence, shall notify the proper authorities designated by law to pursue the investigation of such matters, and shall cooperate with the authorities in the collection of evidence and the prosecution of the case.