A death-row inmate is scheduled to die in the state's death chamber in Huntsville Thursday night for the 1997 slaying of a South Texas woman and her son.
Derrick Frazier is one of two men sent to death row for the slayings of 41-year-old Betsy Nutt and her 15-year-old son, Cody, at their Refugio County ranch.
Frazier's partner, Jermaine Herron, was put to death three months ago.
Frazier would be the 20th Texas prisoner executed this year. That's one more than all the executions last year in the nation's busiest capital punishment state.
But he insists he innocent of the crimes for which he's condemned, contending that he wasn't even present for the murders.
His lawyers are asking the US Supreme Court to halt the execution, alleging jury misconduct at his trial.