They know that the guy is innocent, they know that DNA test will confirm that. What they are concerned about is what will happen after he is found not guilty. W

They know that the guy is innocent, they know that DNA test will confirm that. What they are concerned about is what will happen after he is found not guilty. Who framed him? How, When, Why? In the end of the day many influential people can end up in jail. Plus he will probably get millions from the state for wrongful convocation. They are just covering "their" asses and saving money, for them it is a win win if he stays guilty and is executed.