To put to rest a lot of theories, conspiracies, etc, here is what I know after speaking with a senior law enforcement officer in Idaho tangengtially involved in the case.
1. KK and her lawyer were informed that accessory to 1st degree murder, for which she could be charged, could carry up to life in prison under Federal sentencing guidelines.
2. This could become a Federal case because of the interstate actions of the suspect(s) but that is yet to be determined.
2. KK and her lawyer decided to completely cooperate with law enforcement in return for reduced charges and prison time. Her reduced prison time could still be substantial and she will definitely serve time. She has not been charged because they are truth checking her info and negotiating her charges.
3. From KK and other evidence, law enforcement knows the who, why, how, when, and where of the murder. They do not know where the body is located and may not be able to recover it - that is all my source would say.
4. If this becomes a Federal case, the death penalty for PF becomes more real. Colorado for all practical purposes does not enforce the death penalty on State cases, while the Federal gov't does on Federal cases. A death sentence in CO is essentially life without parole so there is little incentive for PF to plea bargin under leverage to confess if it remains a State case.
That is all I know. I won't reply to any questions or comments. Just wanted to clear up as much of the discussion as possible. It seems the all-source evidence against PF is substantial according to source. Hope this info helps.
