Montana Title 46. Criminal Procedure § 46-18-304. Mitigating circumstances

(a) The defendant has no significant history of prior criminal activity.

(b) The offense was committed while the defendant was under the influence of extreme mental or emotional disturbance.

(c) The defendant acted under extreme duress or under the substantial domination of another person.

(d) The capacity of the defendant to appreciate the criminality of the defendant's conduct or to conform the defendant's conduct to the requirements of law was substantially impaired.

(e) The victim was a participant in the defendant's conduct or consented to the act.

(f) The defendant was an accomplice in an offense committed by another person, and the defendant's participation was relatively minor.

(g) The defendant, at the time of the commission of the crime, was less than 18 years of age.