Convicted killer Yokamon Hearn is scheduled for execution on July 18, 2012 for the carjacking murder of 23-year-old Plano stockbroker Frank Meziere. (credit: Dallas Co. Sheriff’s Dept.)

HUNTSVILLE (CBSDFW.COM/AP) — Convicted killer Yokamon Hearn once bragged how the carjacking murder that would send him to death row earned him a headline.

Now he faces the notoriety of news stories proclaiming him the first Texas prisoner executed under a new single-drug procedure.

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The 33-year-old Hearn is set to die Wednesday evening in Huntsville for the 1998 fatal shooting of Frank Meziere. The 23-year-old Plano stockbroker was abducted at gunpoint while he cleaned his black Mustang convertible at a self-service car wash in Dallas, then shot 10 times.

Hearn would be the sixth Texas prisoner executed this year but the first since officials last week announced the switch to single-drug lethal injections. The previous method used three drugs.

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Hearn has appeals before the U.S. Supreme Court to block the punishment.

(©2012 CBS Local Media, a division of CBS Radio Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)

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