C.R.S. § 34-45-103: Killing in entry by force.

If any persons associate and agree to enter by force of numbers, and such number is calculated to inspire terror, or by force and violence, or by threats of violence, against any persons in the actual possession of any lode, gulch, or placer claim, and upon or into such lode, gulch, or placer claim, and upon such entry, any persons are killed, said persons, and each of them, so entering, shall be deemed guilty of murder in the first degree, and punished accordingly. Upon the trial of such cases, any person cognizant of such entry, who shall either be present, aiding and assisting, or shall by promise of money, property, influence, assistance, or other thing of value, in any way encourage such entry, shall be deemed a principal in the commission of said offense.