Execution of Clayton Lockett

The death of Clayton Derrell Lockett occurred on April 29, 2014, when he suffered a heart attack during an execution by lethal injection in the U.S. state of Oklahoma. Lockett, aged 38, was convicted in 2000 of murder, rape, and kidnapping.

Lockett was administered an untested mixture of drugs that had not previously been used for executions in the United States. Although the execution was stopped, Lockett died 43 minutes after being sedated. He writhed, groaned, convulsed, and spoke during the process and attempted to rise from the execution table fourteen minutes into the procedure, despite having been declared unconscious. The manner of his death drew national and international attention.