A death row inmate in Oklahoma died more than 40 minutes after his execution by lethal injection went awry. 38-year-old Clayton Lockett was sentenced to death for shooting a 19-year-old girl and watching two accomplices dispose of the body by burying her alive.

A death row inmate in Oklahoma died more than 40 minutes after his execution by lethal injection went awry.

Lockett was sentenced to death for shooting a 19-year-old girl and watching two accomplices dispose of the body by burying her alive.

He and another inmate were the first to be scheduled for execution on the same day in Oklahoma since 1937.

Locket was reportedly unconscious ten minutes after the first of three drugs was administered as part of the lethal cocktail injection.

Three minutes later, he was thrashing about and struggling to lift his head up.

The blinds were lowered so the death chamber wasn’t visible from the viewing room and the execution was called off twenty minutes after the first drugs were given to Lockett.

He died around 23 minutes later.

Oklahoma Governor Mary Fallin is quoted as saying: “I have asked the Department of Corrections to conduct a full review of Oklahoma’s execution procedures to determine what happened and why during this evening’s execution of Clayton Derrell Lockett.”

According to Oklahoma Department of Corrections Director Robert Patton, Lockett’s vein exploded, which caused his violent reaction and stopped the deadly drug cocktail from circulating and killing Lockett more quickly.