AdvertisementDeath Penalty Delayed But Not Denied By Drug ProblemsNovember 13, 2013Alan GreenblattfacebookEmailAn April 2005 photo of the death chamber at the Missouri Correctional Center in Bonne Terre, Mo. Gov. Jay Nixon has halted the execution of convicted killer Allen Nicklasson, citing concerns about the use of propofol as an execution drug. (AP)