Grits says that now that the number of innocence-related cases for which DNA evidence still exists are rapidly declining, the next frontier may be arson convictions:
[Jeff Blackburn of the Innocence Project of Texas] predicted that beyond DNA cases, which are increasingly few and far between (because most cases have no DNA evidence, and most DNA evidence collected wasn't preserved), arson cases could constitute the next wave of exonerations in Texas. More than 800 people are in Texas prisons over arson convictions, he said, and dozens if not hundreds were convicted based on forensic science that's no longer considered valid.