The one fact you will never hear when DNA results are being discussed: 1 out of every 100 DNA tests are bungled by the testing lab. Either through mistake, co

The one fact you will never hear when DNA results are being discussed: 1 out of every 100 DNA tests are bungled by the testing lab. Either through mistake, contamination of samples, whatever. So that "1 in X billion" odds they toss around should be viewed with that fact in mind. Oh, and you're not allowed to mention it in court. Ever. They're too afraid the jury will get confused. (The book "Drunkard's Walk: How Randomness Rules Our Lives" contains all the details.)