Texas denies clemency for Robert Roberson despite bipartisan campaign to stop his execution in shaken baby case The Texas TribuneA Texas board rejects clemency plea from a man facing execution in shaken baby syndrome case The Associated PressTexas legislators subpoena Robert Roberson to speak hours before his scheduled execution The Dallas Morning NewsTexas committee approves subpoena for death row inmate ahead of his execution CNNTexas man faces execution after clemency plea fails Al Jazeera English