I feel safe in saying that the percentage of overturned convictions vs. convictions not overturned is extremely small.
Where do you get that statistic from? Are you saying the lawyers are recording how many people contact them requesting to be DNA tested, and that by far, most people are matching the DNA???? I doubt very much that information would be released by the lawyers as it would be a huge conflict of interest to disclose matters of a confidential nature like that. But if you've got a link which shows that, I'd love to see it...
In any event, this is from USA Today in April 2007. If you want to, you can google the exoneration project yourself and get the info...you say you kept up on it, but you said only a few had been exonerated, when we know it was already at 200 in 2007.....hmmmm. Is 200 a few? To me a few is 3-4. Maybe "a few" has a different meaning in the USA?
A former Army cook who spent nearly 25 years in prison for a rape he did not commit is scheduled today to become the 200th person exonerated by DNA evidence, underscoring the quickening pace of overturned convictions, according to the Innocence Project.
The New York-based legal group says the 100th exoneration occurred in January 2002, 13 years after the first exoneration. It took just more than five years for the number to double.
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"Five years ago, people said that the number (of exonerations) was going to dry up because there just weren't many wrongful convictions," said lawyer Barry Scheck, who co-founded the Innocence Project in 1992 to help prisoners prove their innocence through DNA evidence. "But clearly, there are plenty of innocent persons still in prison. There's no way you can look at this data without believing that."
http://www.usatoday.com/news/nation/2007-04-22-dna-exoneration_N.htm