Several states, including Missouri, now use compounded execution drugs purchased from unnamed pharmacies. Courts so far have allowed most executions to move forward. However, on Monday, the Oklahoma Supreme Court stayed the executions of two death row inmates who challenged the secrecy surrounding the process of procuring execution drugs.
Missouri has executed one death row inmate each month since November. Another Missouri inmate, Russell Bucklew, is scheduled for execution on May 21. Only Texas, with seven executions, has executed more inmates than Missouri's four so far in 2014. Florida has also executed four inmates this year.