Just as surely as you don't think DNA was planted, in this case, I can't believe it was not. I can't believe the killer was one who did not know the family and JonBenet; didn't know his way around the house; planned this crime so very carefully as to have gone undetected for seven years and the reason for that being a perp who is so far removed from the family that no one would suspect him.

Now, which one is more hard to believe??? That DNA was planted by a well planning, clever, coniving perp? ,,, or by some unknown person who has been and will continue to be off the radar screen?