Fallin issued the stay for 55-year-old Garry Thomas Allen to give her legal team more time to consider a 2005 Pardon and Parole Board recommendation to commute the sentence to life in prison without parole.
Allen's attorneys say he was mentally impaired at the time of the slaying and is now insane. Allen's attorney, Randy Bauman, declined to comment.
The board voted 4-1 in 2005 to commute Allen's sentence to life and a judge issued a stay of execution before then-Gov. Brad Henry could act on the board's recommendation.
