Oklahoma inmate Clayton Lockett was tasered by guards, and cut his own arm, in the hours just before his ultimately botched execution at the hands of the state's Department of Corrections. Lockett died, possibly from a heart attack, after officials called off his execution after the drugs had been administered. Lockett was to be one of two inmates killed in the state last Tuesday, despite a number of questions over the sourcing, and constitutionality, of the state's untested lethal injection cocktail.  

The full timeline, via the Guardian, details Lockett's last minutes, and provides a little more information on what happened in the execution chamber. Because officials couldn't find a vein on Lockett suitable for the procedure, the phlebotomist tasked with making sure the IVs are inserted properly ended up using a vein in his groin for the procedure. The first drugs entered his body at 6:23 p.m.; the shades to the chamber were lowered at 6:42 p.m.  There's no information on what happened between 6:33, when the second and third execution drugs were administered, and 6:42. 

And then, between 6:44 and 6:56 (the time the execution was called off), here's what happened, according to the report: 

The doctor checked the IV and reported the blood vein had collapsed, and the drugs had either absorbed into tissue, leaked out or both. The warden immediately contacted the director by phone and reported the information to the director. The director asked the following question, "Have enough drugs been administered to cause death?" The doctor responded, "No." The director asked, "is another vein available, and if so, are there enough drugs remaining?" The doctor responded "No" to both questions. The director requested clarification as to whether enough drugs had been administered to cause death. The doctor responded, "No." The director asked the condition of the offender, the warden responded that the doctor was checking the offender's heart beat and found a faint heart beat and the offender was unconscious.

Oklahoma Medical Examiner’s office has confirmed that Lockett's body was sent away for an independent autopsy to determine cause of death. 

The Department of Corrections review recommended an "indefinite" stay of execution in the state, because "it will take several days or possibly a few weeks" to come up with appropriate protocols, and a significant amount of time after that to train staff to carry out those protocols properly. The department's director also advocated for a fully external investigation into the circumstances surrounding Lockett's death. 

The Full Timeline:  

0506 hours: The Correctional Emergency Response Team arrives at Lockett’s cell to escort him to medical for X-rays as part of the execution protocol. Lockett refuses orders to be restrained.

0509: CERT team exits unit in preparation for cell entry.

0550: CERT team and medical personnel on unit to conduct planned use of force. After giving a verbal order to be restrained, offender Lockett refused, and an electronic shock (taser) was administered.

0553: Offender Lockett was taken to H Unit Medical room where it was found he had a self-inflicted laceration to his right arm. Treatment was administered. Offender Lockett was then transported by vehicle to the medical facility, Intermediate Health Care Center at Oklahoma State Penitentiary.

0635: Offender Lockett arrives at IHCC for treatment of self-inflicted injuries which were observed during the cell extradition at 0550 hours.

0645: Offender Lockett was moved to an observation cell in IHCC. Medical personnel examined Offender Lockett’s self-inflicted wounds. Three officers were assigned for continuous observation until 1719 hours.

0700 – 0815: Offender Lockett was checked by the cell watch team, accompanied by medical personnel, every 15 minutes.

0815: Physician Assistant examined offender Lockett and determined that sutures were not needed.

0840: Offender Lockett was returned to an observation cell in IHCC.

0850 – 0935: Offender Lockett was checked by the cell watch team every 15 minutes.

0915 (approx.): Offender Lockett refused visits from his attorneys.

0942: Offender Lockett was offered a food tray and refused the food tray.

0955 – 1045: Cell watch team checked Offender Lockett every 15 minutes.

1025 (approx.): Offender Lockett confirmed his refusal to visit with attorneys.

1111: Offender Lockett was offered a food tray and refused the food tray.

1135 – 1450: Cell watch team checked Offender Lockett every 15 minutes.

1510 – 1555: Cell watch team checked Offender Lockett every 15 minutes.

1610 – 1640: Restraint team escorts offender Lockett from IHCC to H-Unit SW shower (final holding cell prior to execution.)

1655 – 1710: Offender Lockett visits with mental health personnel.

1719: Offender Lockett was escorted from SW shower to the execution chamber by Warden Trammell and the restraint team.

1722: Offender Lockett was placed and restrained on the execution table.

1727 – 1818: Phlebotomist enters execution chamber to determine appropriate placement for IV. The phlebotomist examined offender Lockett’s left and right arms, left and right legs, and both feet to locate a viable insertion point. No viable point of entry was located. The doctor then examined the offender’s neck and then went to the groin area.

1818: The IV insertion process is complete. Insertion point was covered with a sheet to prevent witness viewing of the groin area.

1820: Phlebotomist exits execution chamber.

1823: Warden Trammell receives approval to proceed with the execution from Director Patton. Shades in execution chamber are raised. Offender Lockett was given the opportunity to make a final statement and declined. Warden Trammell begins the execution. Midazolam is administered intravenously.

1830: Doctor checked Offender Lockett for consciousness; offender was still conscious.

1833: Doctor checked Offender Lockett for consciousness; offender was unconscious. Vecuronium bromide is administered intravenously. Potassium chloride is administered intravenously.

1842: Shades lowered; phlebotomist and doctor check IV.

1844 – 1856: The doctor checked the IV and reported the blood vein had collapsed, and the drugs had either absorbed into the tissue, leaked out or both. The warden immediately contacted the director by phone and reported the information to the director. The director asked the following question, “Have enough drugs been administered to cause death?” the doctor responded, “No.” The director asked, “Is there another vein available, and if so, are there enough drugs remaining?” the doctor responded "No" to both questions. The director requested clarification as to whether enough drugs had been administered to cause death. The doctor responded, “No.” The director asked the condition of the offender, the warden responded the doctor was checking the offender’s heart beat and found a faint heart beat and the offender was unconscious.

1856: Director calls off the execution under the authority granted by the governor.

1906: Doctor pronounced Offender Lockett deceased.