Oklahoma Execution

Oklahoma Department of Corrections, File/AP Photo

FILE - This June 29, 2011 file photo provided by the Oklahoma Department of Corrections shows inmate Clayton Lockett. The intravenous line inserted into the groin of Lockett, who writhed and groaned before dying 43 minutes after his execution began, was not properly monitored, causing a swelling the size of a golf ball, according to a state review released Thursday, Sept. 4, 2014.

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