The DNA could first have been planted in JBR's panties after which time she probably touched that area which might be why one of her wrists was no longer bound."

This statement is made twice in this thread and should be cleared up, IMO. When John found JonBenét, both hands were tied.

JBTPF - p 306
LS: What else you remember right at that time?
JR: I just remember talking and, "Come on baby." And I tried to untie her arms. They were tied up behind her head ....
LS: Were they tied tight?
JR: Yeah, very tight ....

DOI pb - p 22

I can't stand the sight of her hands tied and have to do something to get them loose. I start untying her, but I can't get the tight knot undone. Everything begins to blur and I'm slipping out of my mind and losing control. ~snip~