05 October 2015 :

The Oklahoma Court of Criminal Appeals halted 3 executions.
Richard Glossip's execution was delayed on September 30 after officials discovered they did not have the correct drugs to perform the procedure.
Oklahoma Attorney General Scott Pruitt had requested the freeze on executions to give the state time to investigate. The Oklahoma's highest criminal court agreed on October 2.
In addition to Glossip, the executions of inmates Benjamin Cole and John Grant have also been indefinitely delayed. State prison officials said they were posted potassium acetate instead of potassium chloride, the third drug used in Oklahoma's lethal injection formula.
The court ordered the state to provide status reports every 30 days.