Mont. Code Ann. § 7-4-2913

Whenever an inquest is held because of the death of an individual confined in the state prison, the county clerk of the county where the inquest is held shall make out a statement of all the costs incurred by the county in the inquest, properly certified by the coroner of the county. This statement must be sent to the department of corrections for approval, and after approval, the department shall pay the costs out of the money appropriated for the support of the state prison to the county treasurer of the county where the inquest was held.