HOUSTON (AP) — Texas' highest criminal court has postponed the execution of a convicted murderer who contends that new DNA testing could show he's innocent.The Texas Court of Criminal Appeals on Monday put off the scheduled Wednesday execution of 49-year-old Henry Skinner because it is examining how changes in the state law covering DNA testing requests affects cases like his.Skinner was convicted of murdering his girlfriend and her two sons in their Pampa home on New Year's Eve, 1993.Prosecutors have been contesting the new tests, saying courts already have ruled against Skinner. They also say Skinner's trial attorneys chose to not do the tests on evidence now sought by Skinner's lawyers because they feared it would further damage their case.