In regards to why MR has not been named a suspect/POI....
Here in Chicago, I work in the criminal justice system for Cook County. I'm very familiar with the intricacies of criminal cases, and the (sometimes painfully slow) route they take through the system.
I am not well-versed in Colorado law. However, the POI/suspect debate is a national thing, IMO.
Here's a citation for those who like that kinda thing...
SNIPPED
"Normally, we do not publish the names of suspects until theyve been charged with a crime. But in some major cases, such as this one, the information our reporters gather makes it clear to us that a person of interest is indeed a suspect and authorities are preparing to seek charges, even if those charges havent yet been filed. We were not the first media outlet to report the name and, although we had the name earlier, we did not publish it until he was arrested on a probation violation charge."
http://www.washingtonpost.com/blogs...-it-would-you/2012/08/01/gJQAIipUOX_blog.html
It is fairly common practice to hold off on naming an actual POI, until it's deemed the best thing to do for an investigation. Naming a POI, essentially, starts the clock running: Why would they do that, at this juncture? IMO There's no reasonable reason to. They are not on anyone's timer right now, they can proceed with their investigation full steam ahead, without the barrage of b.s. that occurs once you've named a suspect - once you've officially limited the scope of your investigation to that one person.
MOO and all that.