I am not clear if you are asserting that such appeals are always turned down; if so, that's not correct. Such exonerations do occur even in Texas, such as the Ochoa case where later DNA evidence was indeed accepted as exonerating evidence and Mr. Ochoa was freed after having spent 11 years in prison.
If you are saying that new evidence alone is not sufficient, you are correct. Even strong new evidence may not be enough, especially in Texas.
That is what I was trying to say. Thank's for clarifying.
So9