When prosecutors bring forward DNA evidence, they typically argue that these tests are extremely accurate. They often claim, although there is some debate over this, that it would be a one in a billion chance for someone to have identical DNA test results to those of the accused. They push back on defense questioning about possible errors in the collection or testing of the evidence.
All in all, it’s very hard to argue against DNA. When you can tie a suspect’s chromosomes to a crime scene, it’s extremely difficult to claim he wasn’t there. But is that enough?
A Denver man was recently accused of a sex crime based on DNA evidence. Along with several friends he had been to a Fourth of July rooftop party at a woman’s residence. Tragically, the woman apparently passed out at that party. When she awoke the next day, she realized something was terribly wrong. Her panties had been removed, she had vaginal pain, and she did not know what had happened.