Tracy Alan Hansen, 39, is scheduled to die by lethal injection next Wednesday at the state penitentiary at Parchman for the 1987 killing of State Trooper David Bruce Ladner.
Barring any successful last minute appeals, it would be Mississippi's first execution since 1989 and the first by lethal injection.
Hansen's attorneys have asked the Mississippi Supreme Court to reconsider its dismissal of a post-conviction petition by the condemned man. Merrida Coxwell, a Jackson lawyer representing Hansen, said the request is one of the continuing avenues attorneys are pursuing to get the execution postponed.
"There'll be no option left unexercised in this case,'' Coxwell said.
Inmates use post-conviction petitions to try to convince a court that new evidence has surfaced in their case that warrants a new trial.
Thursday, the Mississippi Supreme Court rejected a motion filed by Hansen himself asking for a stay of execution. Hansen filed the motion on July 8.
Supreme Court Justice George C. Carlson Jr. wrote that the high court found no merit to any of Hansen's arguments and denied the motion for a stay.
Coxwell said Hansen has asked Gov. Ronnie Musgrove for clemency. Musgrove said Thursday he had received Coxwell's request and would consider it.
Coxwell describes Hansen as "remorseful, calm, regretful and just waiting.''
"I believe, though I haven't heard this from him so you're not getting this from the horse's mouth, that he expects to be executed,'' Coxwell said.
"I think when you look around the country, with the exception of the states that have been impacted by the Atkins decision, when you see how many people are being executed in Texas and all, I think that is a logical assumption for someone to make,'' he said.