Doyle Skillern, condemned to die for a murder in which the confessed triggerman may soon go free, was executed by lethal injection for the 1974 slaying of Patrick Randel, an undercover narcotics officer. Skillern, 48, died at 12:23 a.m. CST in the Huntsville, Tex., death chamber. Both Gov. Mark White and the U.S. Supreme Court had rejected a reprieve. Testimony showed that Skillern waited in a car while Charles Sanne, 51, shot Randel. Sanne was sentenced to life in prison and could be paroled in June. Skillern was the fifth Texas inmate to die since 1982.