antonio police officer john ` rocky ' riojas in february 2001 .
he is the sixth convicted murderer to be put to death in texas this year that the u.s. supreme court had refused in november to review his case , and no last-day appeals were filed before his execution .
manuel garza jr. was given the same food as the rest of the inmates in his unit for his final meal because texas no longer allows special-order last meals .