A Lubbock man is set to be executed for killing his parents at their home 15 years ago during a drug-influenced rampage that also left his 89-year-old grandmother dead.
Michael Yowell is trying to block his execution by joining a lawsuit with two other condemned prisoners. They're challenging Texas prison officials' purchase of a new supply of pentobarbital for his scheduled Wednesday evening lethal injection in Huntsville.
A federal appeals court late Tuesday rejected the lawsuit, agreeing with Houston federal judge who ruled prison officials have done nothing wrong.
Evidence showed Yowell, an ex-con with a $200-a-day drug habit, shot his father and strangled his mother. Then he opened a gas valve in the home and fled. When the house blew up, the grandmother was fatally injured.