Based off Sam's Nov. 6th video, KK testified the convo took place at the Franchette, after they'd had the sonic and talked for a few hours. She was tired, it was starting to snow and she told him she wanted to go home. He basically told her they needed to go get the tote so that she could take it back with her to Idaho.
If she hadn't driven her friend's car with the expired tags, I wonder if she would have actually taken KB's body or if she was just using that as an excuse?
What's strange is that he made her drive to Woodland Park to send the text to CB, then had her meet him at the Sunoco. Suddenly it dawned on him the importance of cellular location? I think he was really banking on everyone believing KB just took off and that no one would really care...and that KK would be his scapegoat just in case.
JMO