I've been reading these threads since a few days after the murders, but haven't posted until today, so bare with me if I don't do this right.
I've been thinking this through from day one and my theory has changed multiple times. I've finally got one that sticks in my head, and I can't visualize it any other way now.
I feel that the killer(s) were looking for something or someone. (my mind is thinking 3/4 people were involved. If it was common knowledge that CRsr and DR had reconciled, maybe the killers assumed CRsr would be at her place, so they went there first. If DR was still awake (having posted on FB after 2:30 am), she would obviously know who had been there looking for CRsr so they killed her and her 2 kids. The killers then moved on down the road to CRsr and FR place and split up, to eliminate the risk of FR and HR hearing anything. I think CRsr knew at least one of the killers, and thinking it was only going to be a discussion, he puts the dogs outside. The killers start pressing him for information about where ??? is and thinks start getting physical. CRsr isn't forthcoming with the information or the goods, so they shoot him somewhere, still no answers so they shoot GR. CRsr has no idea his whole family has been killed. They then move on the KR thinking maybe whatever they're looking for is stashed there, since it's more remote.
i think DS is acting squirelly because he's scared to death that he could be next. He comes across to me as the type of person that always tells those "big fish" stories. (You know, how he caught this 4ft fish in the tiny local fishing hole.) that being said, I think the whole money story isn't true, we only have his word on it, we also only have his word that he was supposed to be there the night before.
i think it's possible that someone close to the family may have slipped up in conversation somewhere and said something that led up to this. Maybe even gave out personal information as to how to get in and out of the houses. Probably not intentionally, but now they realize they unknowingly helped in this, so now they are acting odd.
This is is all JMO