CrimePunishment wrote:
One theory is that he lied about Kim wetting the bed because he wanted it to appear that Kim was never in the room since he killed her in the master bedroom.

I also wonder if he was telling the truth -- in that he found Kris in the wet bed but Kim had wet it earlier and Colette put Kim back in her bedroom. So Mac found Kris in the wet bed but it was Kim who wet it.

Because Kim was hit by the door to the master bedroom she might have been coming into the master bedroom from her own bedroom. If she was in the bed when the fight started then it is possible that she would have been hit when she was standing closer to the bed. I get the impression that Kim walked in on the fight but was not there for the start of the fight which would have been the case if she had been in the bed.
Did't I read somewhere that Kristen's pjs didn't show any evidence of the urine on them?  If so, I kind of doubt the theory about his actually moving Kristen.

I think the theory more likely that it really was Kimmie that he moved but, since he had NO clue that investigators would be able to place her in the MBR due to blood typing, he figured no one would ever know.  I swear, the more I learn about and think about this case, the more convinced I am that he really DID do it and that he's not just a lying jerk but a REAL monster!!