Petitioner-Appellant Raymond Levi Cobb seeks a certificate of appealability *703 (“COA”) on two issues that the district court deemed unworthy of appellate review. Cobb seeks a COA from this Court on two related claims, both of which challenge his death sentence. Cobb’s arguments spring from the testimony of an expert witness called by the government in the punishment phase of the trial to testify about the probability that Cobb would commit criminal acts of violence in the future that would constitute a continuing threat to society. Cobb alleges that this witness falsified his credentials and perjured himself when explaining them to the jury. We are inclined to believe that, at most, a simple transcription error occurred, however, we need not decide the issue.

In light of the United States Supreme Court’s recent decision in Roper v. Simmons, 1 Texas Governor Rick Perry has commuted Cobb’s death sentence to life imprisonment. As Cobb’s petition for a COA challenges only his death sentence, and not his underlying conviction, his petition is now moot because Governor Perry has granted him the relief that he requested.

PETITION DISMISSED.