After United States death row inmate Clayton Lockett on Wednesday took more than 40 minutes to die after an experimental lethal injection, here's a look at other execution cases which have attracted attention.
Napoleon Beazley (2002)
Beazley was 17 when he was arrested for the murder of 63-year-old businessman John Luttig in Texas. Beazley shot Luttig in his garage on April 19, 1994. He also fired at Luttig's wife but she survived the attack. He was convicted and sentenced to death. Before his execution date the Supreme Court began reviewing the law on sentencing juveniles to death, but Beazley was put to death on May 28. In 2005, the Supreme Court ruled that the execution of juveniles was cruel and unusual punishment and therefore illegal under the United States constitution. Beazley was one of the last juveniles to be executed in the US.
Cameron Todd Willingham (2004)
Willingham was convicted of murdering his three daughters in a house fire in Texas in 1991. Willingham refused to plead guilty at his trial despite the fact that this would spare him from the death penalty. During and after his trial scepticism began to grow over the evidence that the fire was caused deliberately. A fire inspector reviewed the case and said that he did not believe the evidence pointed fairly towards arson. Despite this Willingham was executed on February 17, 2004. After his death concerns over the evidence continued to grow leading to a report in the New Yorker quoting various experts as saying the evidence for arson was unconvincing and had information been available before his death Willingham would have been acquitted. The report led to a formal review of the case and in 2009 the Texas Forensic Science Commission said the fire marshal's declaration of arson was unfounded.
Kelsey Patterson (2004)
Patterson was convicted of the murder of Louis Oates, 63 and Dorothy Harris, 41. On August 25, 1992, Patterson walked behind Oates at his workplace in Palestine, Texas, and shot him in the back of the head. Patterson then left only to return soon after to kill Harris, when he heard her screams at discovering Oates' body. Patterson had been involved with two non-fatal shootings before this event, but he was diagnosed with paranoid schizophrenia so was deemed unfit to stand trial. After the murders of Oates and Harris, psychiatrists found him to be suffering from schizophrenia and under the delusion that he was being controlled by aliens. Despite this Patterson stood trial was convicted and sentenced to death. The Texas board of Pardons and Paroles advised that Patterson's sentence should be reduced from death to life imprisonment on the grounds of mental illness. Texas Governor Rick Perry overruled this saying "This defendant is a very violent individual - in the interest of justice and public safety, I am denying the defendant's request for clemency". Patterson was executed in May 2004.