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A man convicted of fatally running down a police officer during a high-speed chase has been executed in America.
Daniel Lopez received a lethal injection at the Texas death chamber in Huntsville and was pronounced dead at 6.31pm local time on Wednesday.
In 2009, Corpus Christi Police Lieutenant Stuart Alexander, 47, was laying spikes on the road to flatten tires when Lopez's SUV hit him and sent him flying 53 metres in the air.
Lopez, 27, who said he did not intend to kill the officer, fought for years to speed up the date of his execution and dropped appeals for a stay of execution.
Prison officials in Arizona have denied inmate Joseph Rudolph Wood was in pain during execution yesterday afternoon.
Wood gasped for around 90 minutes during his execution and eventually died almost two hours after the lethal drugs where administrated. His lawyers filed an emergency appeal while the execution was ongoing.
State Departments of Corrections Director Charles Ryan said he was assured "unequivocally" that Mr Wood was aware of what was happening, or in any pain.
Throughout this execution, I conferred and collaborated with our IV team members and was assured unequivocally that the inmate was comatose and never in pain or distress.
A full review has been ordered into the execution of double murderer Joseph Wood, who took two hours to die after being given a lethal injection.
Arizona's Governor Jan Brewer said that while justice had been done she was concerned by how long the lethal injection procedure took.
She said: "One thing is certain, however, inmate Wood died in a lawful manner and by eyewitness and medical accounts he did not suffer.
"This is in stark comparison to the gruesome, vicious suffering that he inflicted on his two victims, and the lifetime of suffering he has caused their family."
A death row inmate "gasped and snorted" as he took two hours to die by lethal injection in the latest "botched" execution in America, Reuters reported.
Double killer Wood, 55, was given a lethal injection of drugs at 1.52pm local time but was not pronounced dead until 3.49pm, the Arizona attorney general's office said.
Prior to his execution Wood was one of six death row inmates who sued Arizona arguing secrecy surrounding the drugs used in other botched executions in Ohio and Oklahoma violated their human rights.
His death raises questions about the use of the death penalty in the US.
The White House has said the botched execution of a death row prisoner in Oklahoma fell short of the humane standards that must apply to carrying out the death penalty.
The execution of Clayton Lockett was stopped when he regained consciousness after receiving a lethal injection, before dying from a heart attack around 30 minutes later.
ITV News Washington Correspondent Robert Moore reports.
The drugs used in a botched lethal injection in Oklahoma were the subject of an appeal from lawyers representing two death row inmates.
The execution of Clayton Lockett was stopped after the drugs he was administered "weren't working as designed", prison officials said.
Lawyers for Lockett and fellow inmate Charles Warner had argued before the botched execution that the use of an untested cocktail of drugs could subject their clients to "cruel and unusual punishment", which is prohibited by the US constitution.
Oklahoma's governor has announced a new evaluation of the state's procedures for lethal injections following the botched execution of an inmate earlier.
I've postponed tonight's second execution and ordered an evaluation of Oklahoma's lethal dosage protocol.http://t.co/hqMhY3tX6J