I was reading up on this yesterday. Not only did it say that 13 markers are necessary, it continued: Conversely, if there aren't 13 markers, the guy is innocent. So almost simply doesn't cut it as possible...it eliminates the person
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This is true if they have all the markers in the evidence. I think in this case they do not.
What they have is a bit of evidence, a very tiny bit, with some number of markers less than 13. The player in question matches all the markers they have, but they do not have enough for a match. Do they have 12 or 6 markers will be important information.
Who's to say she didn't take a swipe at one of the boys. She was freakin' pi***** and women tend to grab with their nails. But turning a scratch into rape and NO OTHER DNA ON HER CLOTHING from not just one but all three boys is a real stretch.