There was speculation from one of the investigators, that the DNA was from the factory where the underpants were made. The pair she had on when she was found were new out of a package in the home, and were too large...or that she had borrowed new underpants from a friend (she had lots of bathroom issues). I can’t remember which it was.
Incidentally, this investigator wrote a book (i read it a while ago) and came to the conclusion that Jon Benet wet her bed, mom was really irritated, and while cleaning her up, mom either shoved her or yanked her, causing her to hit her head on the tub (or sink?) in her bathroom. Serious head injury resulted. Mom panicked and set up the kidnapping/ransom scenario.
I’m typing this from memory, so some of the details might be slightly different, but the “mom did it and here’s how/ why” part is right.
I believe that was Steve Thomas who wrote the book. His theory of what happened that night makes the clearest sense of this odd case. Most people who don't accept it do so on the belief that "a Mom doesn't kill a daughter she loves dearly". If only this were true.
As I mentioned in an earlier post, I stick with Occam's Razor when analyzing this case: the simplest answer is most often correct. O.R. also states that "one should not increase, beyond what is necessary, the number of entities required to explain anything".
In order to make the Intruder Theory work, we have to increase the entities to an almost absurd level, beginning with the ransom note. No killer sits down, in the house of the victim, and writes a 2-and-a-1/2 page ransom note WITH A PEN FOUND IN THE HOUSE ON A NOTEPAD ALSO FOUND IN THE HOUSE.
On a side note, my family and I were living in Cheyenne, Wyoming in 1996 and my folks had come out for Christmas. We all remember how much fun we had that Christmas Eve and morning, followed by the feeling of sickness that came over us as we watched this case begin to unfold later that day. Boulder isn't that far from Cheyenne. As we were celebrating a joyous Christmas, just south of us a young girl's life was being brutally ended.
Incidentally, this investigator wrote a book (i read it a while ago) and came to the conclusion that Jon Benet wet her bed, mom was really irritated, and while cleaning her up, mom either shoved her or yanked her, causing her to hit her head on the tub (or sink?) in her bathroom. Serious head injury resulted. Mom panicked and set up the kidnapping/ransom scenario.
Her main cause of death was a garrat around the neck, I think the mom shoved her, she fell over and hit her head and went comatose and her mom freaked out and killed her rather than face any sort of child abuse charges...
If her mom had called 911 and got her hospitalized for her head trauma she would have recovered and she could have claimed she tripped and fell or something, but her mom was so vicariously living through her she went completly koo koo when that all seemed to fall apart...