Yeah, I think the increase in our ability to analyze DNA will really work in everybody's favor. It's a lot harder to keep on pleading NG if'n your DNA is spattered all over the scene, or the victim. By the same token, I think most prosecutors would be reluctant, these days, to pursue the death penalty without some solid physical evidence linking the defendant to the crime. Thanks to DNA, I have every confidence that future findings of guilt or innocence will be a lot more solid than some past cases.
Still, there are plenty of guys awaiting death in cases that have no physical evidence, DNA or otherwise, linking them to the crime. I don't think there's all that many of them in Washington, but head to the south, and the story changes.
Pretty cool stuff happening with DNA. There've been many rapists caught these days, thanks to DNA. Standard practice now is to pull DNA from old cold cases, and input the data into a nationwide database. Newly collected offender DNA is compared to that database. Say rapist A rapes a woman in Seattle in 1995, flees town, and avoids arrest. Cops load a DNA sample in the database in 2000. Rapist A goes down for assault 3 in Florida in 2005. Sometime during his stretch, CO's collect a DNA sample from rapist A, and compare it to the database. They get a hit on the '95 Seattle rape, and they get on the phone. In a day or two, a Seattle detective catches a flight, and interviews rapist A. Justice is served. Might be served cold, but it's still tasty.