HUNTSVILLE (AP) - The Texas parole board has rejected a clemency request from a convicted killer set to die this week for a robbery and shooting spree that left five people dead at a Dallas-area car wash 12 years ago.

The Texas Board of Pardons and Paroles turned down the request from 40-year-old Robert Wayne Harris on Tuesday. He still has appeals before the U.S. Supreme Court to try to keep him from lethal injection Thursday evening in Huntsville.

Harris was condemned for the massacre at the Mi-T-Fine Car Wash in Irving in March 2000 a week after he’d been fired from his job there. He’s never denied the crime.

He also was charged but never tried for the abduction-slaying of an Irving woman four months before the car wash killings.

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