All I see is circumstantial evidence leading to CR and JR, while MB seems to be an unwitting accomplice in covering for CR. The fact that these people can so easily move on with their lives shows me that they appear to be soulless. I consider people without a conscience to be sociopaths, at least to some degree.
What circumstantial evidence is there leading to CR and JR (that the public knows of)? It's questionable if even LE must not know about it by the way they are handling the case. They clearly aren't saying they weren't with her and the only circumstantial evidence I can think of just confirms what they admit to anyway.
Why couldn't JR be an unwitting accomplice in covering for CR? I don't understand how you are connecting the dots. Why couldn't MB and JR have done something after CR was passed out in bed?
How does MB escape your wrath? It seems to me in your scenario he'd be right in the middle of it no matter how you cut it. In fact, how can we not say he's the biggest duck in the pond?
And if we are to believe their stories and they are innocent, why wouldn't they be trying to move on with their lives? And for that matter how can any of us know how much this haunts them when they turn out the lights? If JR is telling the truth then I cannot imagine how much he'd wish he'd done things differently that night.
Every move they make could be interpreted to point to guilt if we only filter it thru a prism that says "they have to be the guilty party".