Thanks for that. Very helpful. I lean toward second-degree for Shan'ann, followed by first degree for the girls. I think it would be out of character for someone like CW to plot the murder of his (presumably beloved) children in order to punish SW. I'm not sure why CW would be so angry with SW
to punish her in that way. SW seemed earnest in her attempts to save the marriage, and there were no texts of threats or other potential motives for such an anger by CW toward her. Furthermore, it doesn't seem like CW thought through his crime at all. Anyway you slice it, all suspicion would fall on him almost immediately. While he is obviously no genius, I would think any forethought would have presented only one outcome: his getting busted. I suspect there may have been fantasies of eliminating his 'problem' with direct action, and then CW came home late and she said something to trigger a fit of anger in Chris. Maybe it was something that directly threatened his continued relationship with NK, which he wanted to preserve at all costs. Whatever it was, he choked her unconscious (doesn't take that long to do), then continued choking her until she was dead. Taking stock--and in a machine-like dissociated state--he made some even worse choices. Knowing SW would never leave her children (the 'disappearing wife' scenario), the only way he could make her disappearance seem even remotely plausible would be to have the girls disappear also, as though SW left with the girls. So he did the unthinkable.
But there is so much he didn't consider, such as leaving her cell phone & shoes behind (how dumb was that), or how and where he disposed of the bodies (obviously the cops would converge on well #319 after a single interview, or after interrogating GPS data from the truck). He didn't even give himself any time to dispose of the bodies properly: if he was thinking about the truck GPS giving away his movements, he had to know there would be risk of co-workers arriving at well 319 while he was up on a tank stuffing a body through that small hole. This murder was simply a no-way out scenario for him from the get-go. Even someone as stupid as Chris Watts must have been able to foresee these things if he had pre-planned the whole thing...!?