This photo combo of images provided by the Oklahoma Department of Corrections shows Clayton Lockett, left, and Charles Warner. Lockett and Warner, two death-row inmates who want to know the source of drugs that will be used to execute them, have placed Oklahoma�s two highest courts at odds and prompted aggravated members of the Legislature to call for the impeachment of Oklahoma Supreme Court justices. (AP Photo/Oklahoma Department of Corrections)
McALESTER, Okla.--- The director of the Oklahoma Department of Corrections says an inmate whose execution was halted because the delivery of a new drug combination was botched has died of a heart attack.
Director Robert Patton says inmate Clayton Lockett died Tuesday after all three drugs were administered.
Patton halted Lockett's execution about 20 minutes after the first drug was administered. He says there was a vein failure.
Lockett was writhing on the gurney and shaking uncontrollably.
The planned execution later Tuesday of a second inmate was postponed.