Montana Title 45. Crimes § 45-5-303. Aggravated kidnapping

(1) A person commits the offense of aggravated kidnapping if the person knowingly or purposely and without lawful authority restrains another person by either secreting or holding the other person in a place of isolation or by using or threatening to use physical force, with any of the following purposes:

(2) Except as provided in 46-18-219 and 46-18-222, a person convicted of the offense of aggravated kidnapping shall be punished by death or life imprisonment as provided in 46-18-301 through 46-18-310 or be imprisoned in the state prison for a term of not less than 2 years or more than 100 years and may be fined not more than $50,000, unless the person has voluntarily released the victim alive, in a safe place, and with no serious bodily injury, in which event the person shall be imprisoned in the state prison for a term of not less than 2 years or more than 10 years and may be fined not more than $50,000.