There are two issues at law here - Use of Deadly Force in Defense Against an Intruder (Make My Day), and Use of Deadly Force in Defense of a Person - regardless of what both articles say.

I suspect the Defense, would like this to be considered under the Defense Against Intruder law (CRSC.R.S. 18-1-704.5 ) - since the standard for the use of force is:  "when the occupant reasonably believes that such other person might use any physical force, no matter how slight, against any occupant."

However, the case will also fall under CRS 18-1-704. Use of physical force in defense of a person
where:
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
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