A condemned killer faces execution May 21 for the 1999 stabbing death of a Texas prison guard.
The Corpus Christi Caller-Times reports a judge Wednesday set the execution date for Robert Pruett.
Judge Bert Richardson ruled DNA testing would not have changed a jury's decision. Additional DNA testing ordered last year also led to inconclusive results.
Dan Nagle was a guard at the McDonnell Unit near Beeville. Prosecutors say Pruett, who was serving 99 years for a Harris County slaying, was mad over Nagle's disciplinary report about the inmate trying to take a sack lunch to a recreation yard.
Pruett faced execution last year but the penalty was halted to allow additional DNA testing on a partial palm print on the report. The source of the print remains unknown.