HUNTSVILLE, Texas (AP) - Sex offender Ramon Torres Hernandez is headed for execution for the rape, robbery and slaying of a 37-year-old San Antonio woman 11 years ago.

Hernandez was one of three people convicted in the murder of Rosa Maria Rosado. She was grabbed and thrown into a car driven by Hernandez when she wouldn't release her purse during a drive-by robbery at a San Antonio bus stop.

The U.S. Supreme Court last month refused to review his case, and the Texas Board of Pardons and Paroles refused the 39-year-old Hernandez's a clemency request earlier this week.

His execution Wednesday evening in Huntsville would be the 14th this year in Texas. Another inmate, Preston Hughes, is to die Thursday for a double murder in Houston in 1988.