Thanks to Virginia's stash of archived, decades-old biological samples...

"...The institute's researchers found that in 5 percent of homicide and sexual assault cases, DNA testing ruled out the convicted person. If the scope is narrowed to just the sexual assault convictions, DNA testing eliminated between 8 percent and 15 percent of convicted offenders. The wrongful conviction rate previously had been estimated at 3 percent or less...."

Those seem like some pretty high numbers..and that's just Virginia - who knows what they would find if they did something like this in Texas.