The 5th U.S. Circuit Court of Appeals has rejected arguments from 32-year-old Robert Pruett and 39-year-old Bobby Lee Hines.
Pruett in December 1999 was at the McConnell Unit prison near Beeville in South Texas, serving 99 years for a slaying in Harris County, when he used a shank to fatally stab a corrections officer.
Hines was condemned for the 1991 death of a 26-year-old woman at her Dallas apartment. He was 19 at the time and on probation from a 10-year burglary sentence after spending three months in a boot camp.