McALESTER, Okla. (AP) — Oklahoma prison officials halted an inmate's execution after a new drug combination left the man writhing and clenching his teeth on the gurney. He later died of a heart attack.
Clayton Lockett, 38, was declared unconscious 10 minutes after the first of three drugs in the state's new lethal injection combination was administered Tuesday evening. Three minutes later, he began breathing heavily, writhing, clenching his teeth and straining to lift his head off the pillow.
The blinds were eventually lowered to prevent those in the viewing gallery from watching what was happening in the death chamber, and the state's top prison official eventually called a halt to the proceedings. Lockett died of a heart attack a short time later, the Department of Corrections said.