18-1-704. Use of physical force in defense of a person.
1. Except as provided in subsections (2) and (3) of this section, a person is justified in using physical force upon another person in order to defend himself or a third person from what he reasonably believes to be the use of imminent use of unlawful physical force by that other person, and he may use a degree of force which he reasonably believes to be necessary for that purpose.
2. Deadly physical force may be used only if a person reasonably believes a lesser degree of force is inadequate and:
1. The actor has reasonable ground to believe and does believe, that he or another person is in imminent danger of being killed or of receiving great bodily injury; or
2. The other person is using or reasonably appears about to use physical force against an occupant of a dwelling or business establishment while committing or attempting to commit burglary as defined in sections 18-4-202 to 18-4-204; or
3. The other person is committing or reasonably appears about to commit kidnapping as defined in section 18-3-301 or 18-3-302, robbery as defined in section 18-4-301 or 18-4-302, sexual assault as set forth in section 18-3-402 or in section 18-3-403 as it existed prior to July 1, 2000, or assault as defined in sections 18-3-202 and 18-3-203.
3. Notwithstanding the provisions of subsection (1) of this section, a person is not justified in using physical force if:
1. With intent to cause bodily injury or death to another person, he provokes the use of unlawful physical force by that other person; or
2. He is the initial aggressor, except that his use of physical force upon another person under the circumstances is justifiable if he withdraws from-the encounter and effectively communicates to the other person his intent to do so, but the latter nevertheless continues or threatens the use of unlawful physical force; or
3. The physical force involved is the product of a combat by agreement not specifically authorized by law.