There was an article on HN a while back which demonstrated how presenting this kind of evidence works in practice. Police arrested a suspect on a DNA match, pu

There was an article on HN a while back which demonstrated how presenting this kind of evidence works in practice. Police arrested a suspect on a DNA match, put on a dog and pony show for the jury about how absurdly unlikely it was for the DNA to match by chance, he was convicted and put away for a long time. What the jury didn't know - because the prosecutors managed to block the defence from telling them - is that the police had found half-a-dozen locals who were DNA matches and chosen the most unsavoury-sounding one to arrest. The tale they'd told the jury about the absurd odds of a DNA match if he wasn't the criminal was a bunch of nonsense, and the defence weren't allowed to clue them in about this. He's probably still in jail right now.