known as potassium acetate. the drug they are meant to have for the execution protocol is potassium chloride. the oklahoma department of correction tells local news station, it is unclear how the potassium acetate was obtained in the first place. oklahoma's lethal injection protocols were called into question following the gruesomely botched execution of clayton locket on april 2014 who would be seen writhing on the gurney. >> after the state began pumping a lethal combination of drugs into the arm of clayton locket, accused of shooting a woman and burying her alive, something went wrong. a reporter was one of the official witnesses. >> he began kicking his feet, lifting his head and his chest off the gurney, grimacing, and a couple of moments he mumbled. >> that botched execution prompted richard glossip and two