Death row inmate Michelle Byrom argues in new documents filed with the Mississippi Supreme Court that she has new evidence that her son killed her husband and never sought to hire a hitman as he told prosecutors.
Byrom's attorneys asked the Supreme Court Monday to grant her motion to pursue that issue in trial court.
In such post-conviction petitions, an inmate argues he has found new evidence, or a possible constitutional issue, that could persuade a court to order a new trial.
The U.S. Supreme Court denied Byrom's motion for appeal Monday.
Mississippi Attorney General Jim Hood has also asked the state Supreme Court to set an execution date for March 27.
Byrom was convicted and sentenced to death in 2000 in Tishomingo County for the killing her husband.