If it wouldn't, then he doesn't. But you're not the jury. He's had a fair trial with 12 jurors deciding his guilt. . . This DNA test gives negative, not positive, evidence. It would not have made a difference in the jury's verdict. . .
Nobody knows for sure.
Let's just give him a new trial. Before trial, it's up to the state to prove that he's guilty. Now, it's up to him to prove that he's innocent. You think not. He had an opportunity at the writ hearing to say why he was confessing, and why he was telling people that he had raped a girl if he hadn't.