But the DNA evidence was so consistent precisely because it was wrong. It turned out that the cotton swabs used to collect the DNA samples had all been accidentally contaminated by a woman working in the swab factory.
Pero el mismo ADN estaba presente en todas las pruebas porque los bastoncillos de algodón usados para recolectar las muestras de ADN fueron contaminados accidentalmente por una operaria de la fábrica de algodón.