Clayton Lockett spent forty minutes writhing in agony before dying of a heart attack . A death row inmate spent forty minutes writhing in agony before dying of a heart attack following a new cocktail of drugs administered in a lethal injection on Tuesday night. Oklahoma prison officials halted Clayton Lockett's execution after the experimental drug left the man writhing and clenching his teeth on the gurney. The 38-year-old, who was found guilty of shooting a woman and watching his friends bury her alive, was declared unconscious ten minutes after the first of the state's new three-drug lethal injection combination was administered. Three minutes later, though, he began breathing heavily, writhing, clenching his teeth and straining to lift his head off the pillow. It later emerged his vein had ruptured. The blinds were eventually lowered to prevent those in the viewing gallery from watching what was happening in the death chamber, and the state's top prison official eventually called a halt to the proceedings. Lockett died of a heart attack a short time later, the Department of Corrections said. Local media present said Mr Lockett sat up and said 'something’s wrong' 13 minutes into the procedure. 'It was a horrible thing to witness. This was totally botched,' said Lockett's attorney, David Autry. Scroll down for video . Oklahoma Department of Corrections director Robert Patton, left, called off the failed execution. Lockett was sentenced to death for shooting Stephanie Neiman, right, and watching his friends bury her alive . Witness Ziva Branstetter told broadcaster MSNBC Lockett was thrashing about and appeared to be in pain. 'His . body was sort of bucking. He was clenching his jaw. Several times he . mumbled phrases that were largely unintelligible,' she said. A Tulsa World newspaper claimed that Lockett was 'still alive,' and lifted his head as prison officials lowered the blinds. Tuesday was the first time Oklahoma used the drug midazolam as the first element in its execution drug combination. Other . states have used it before; Florida administers 500 milligrams of . midazolam as part of its three-drug combination. Oklahoma used 100 . milligrams of that drug. Republican Gov. Mary Fallin ordered stay of execution for Charles Warner who was scheduled to die two hours after Lockett . 'They should have anticipated possible problems with an untried execution protocol,' Autry said. 'Obviously . the whole thing was gummed up and botched from beginning to end. Halting the execution obviously did Lockett no good.' Republican . Gov. Mary Fallin ordered a 14-day stay of execution for an inmate who . was scheduled to die two hours after Lockett, Charles Warner. She . also ordered the state's Department of Corrections to conduct a 'full . review of Oklahoma's execution procedures to determine what happened and . why during this evening's execution.' Robert . Patton, the department's director, halted Lockett's execution about 20 . minutes after the first drug was administered. He later said there had . been vein failure. The execution began at 6:23 p.m., when officials began administering the first drug, the sedative midazolam. A doctor declared Lockett to be unconscious at 6:33 p.m. Once . an inmate is declared unconscious, the state's execution protocol calls . for the second drug, a paralytic, to be administered. The third drug in the protocol is potassium chloride, which stops the heart. 6:23 p.m. - The injection process begins. Lockett has heavy, slow blinks, laid still . 6:29 p.m. - Consistently closed his eyes . 6:30 p.m. - First check of consciousness; still conscious . 6:33 p.m. - Announced Lockett was officially unconscious . 6:34 p.m. - Lockett started to move his mouth . 6:36 p.m. - Lockett began convulsing and mumbling . 6:37 p.m. - Lockett sat up and said 'something's wrong' 6:39 p.m. - Prison officials lowered the blinds . 7:06 p.m. - Lockett dies of massive heart attack . Patton . said the second and third drugs were being administered when a problem . was noticed. He said it's unclear how much of the drugs made it into the . inmate's system. Lockett began writhing at 6:36. At 6:39, a doctor lifted the sheet that was covering the inmate to examine the injection site. 'There . was some concern at that time that the drugs were not having that . (desired) effect, and the doctor observed the line at that time and . determined the line had blown,' Patton said at a news conference . afterward, referring to Lockett's vein rupturing. After an official lowered the blinds, Patton made a series of phone calls before calling a halt to the execution. 'After . conferring with the warden, and unknown how much drugs went into him, . it was my decision at that time to stop the execution,' Patton told . reporters. Lockett was declared dead at 7:06 p.m. Autry, . Lockett's attorney, was immediately skeptical of the department's . determination the issue was limited to a problem with Lockett's vein. 'I'm . not a medical professional, but Mr. Lockett was not someone who had . compromised veins,' Autry said. 'He was in very good shape. He had large . arms and very prominent veins.' Bailey Elise McBride, who reports for the Associated Press in their Oklahoma bureau, tweeted immediately after the botched execution . 'After weeks of Oklahoma refusing to . disclose basic information about the drugs for tonight's lethal . injection procedures, tonight Clayton Lockett was tortured to death,' said Madeline Cohen, an attorney for Warner. Adam . Leathers, co-chair of the Oklahoma Coalition to Abolish the Death . Penalty, accused the state of having 'tortured a human being in an . unconstitutional experimental act of evil,' reported CNN. In . Ohio, the January execution of an inmate who made snorting and gasping . sounds led to a civil rights lawsuit by his family and calls for a . moratorium. Nightmare: Patton said the inmate was writhing on the gurney, pictured, and shaking uncontrollably about 13 minutes into the execution . Tuesday was the first time Oklahoma . used the drug midazolam as the first element in its execution drug . combination. Other states have used it before; Florida administers 500 . milligrams of midazolam as part of its three-drug combination. Oklahoma . used 100 milligrams. The . problems with the execution are likely to fuel more debate about the . ability of states to administer lethal injections that meet the U.S. Constitution's requirement they be neither cruel nor unusual punishment. That question has . drawn renewed attention from defense attorneys and death penalty . opponents in recent months, as several states scrambled to find new . sources of execution drugs because drugmakers that oppose capital . punishment - many based in Europe - have stopped selling to prisons and . corrections departments. Defense . attorneys have unsuccessfully challenged several states' policies of . shielding the identities of the new sources of their execution drugs. Missouri and Texas, like Oklahoma, have both refused to reveal their . sources, but both of those states have since successfully carried out . executions with their new supplies. The state has stood by the execution but said Monday that it's boosting the dosages of its lethal injection drugs. A . four-time felon, Lockett was convicted of shooting 19-year-old . Stephanie Neiman with a sawed-off shotgun and watching as two . accomplices buried her alive in rural Kay County in 1999 after Neiman . and a friend arrived at a home the men were robbing. Warner had been scheduled to be put to death two hours later in the same room and on the same gurney. The 46-year-old was convicted of raping and killing his roommate's 11-month-old daughter in 1997. He has maintained his innocence. Lockett . and Warner had sued the state for refusing to disclose details about . the execution drugs, including where Oklahoma obtained them. The . case, filed as a civil matter, placed Oklahoma's two highest courts at . odds and prompted calls for the impeachment of state Supreme Court . justices after the court last week issued a rare stay of execution. The . high court later dissolved its stay and dismissed the inmates' claim . that they were entitled to know the source of the drugs. By . then, Fallin had issued a stay of her own - a one-week delay in . Lockett's execution that resulted in both men being scheduled to die on . the same day. Warner was served a final meal Tuesday of 20 boneless chicken wings, potato wedges, cole slaw, two fruit cocktail cups and a 20-ounce soda. Lockett's request of steak, shrimp, a large baked potato and a Kentucky Bourbon pecan pie was denied because it exceeded the $15 limit. He declined a separate offer from the warden for a dinner from Western Sizzlin', prison officials said. Oklahoma changed its execution protocols twice this year, leaving State officials with five options for lethal injections, including a new three-drug mixture that was used for the first time Tuesday. Two of the drugs used carry warnings that they can suppress the respiratory system and the third warns that cardiac trouble can occur at high but non-lethal doses, and lists specific steps to take if a medical patient receives too much of the drug but doesn't die.
Clayton Lockett execution halted 20 minutes after first drug administered .
The cocktail of injections have not been tried in Oklahoma before .
For reasons unclear the drugs didn't kill him .
Lockett sat up 14 minutes in and said 'something's wrong'
The inmate finally suffered a massive heart attack and died at 7.06p.m.
Lockett was sentenced to death for shooting a 19-year-old Perry woman .
Refused last meal as it exceeded $15 price limit .
Clayton Lockett spent forty minutes writhing in agony before dying of a heart attack . A death row inmate spent forty minutes writhing in agony before dying of a heart attack following a new cocktail of drugs administered in a lethal injection on Tuesday night. Oklahoma prison officials halted Clayton Lockett's execution after the experimental drug left the man writhing and clenching his teeth on the gurney. The 38-year-old, who was found guilty of shooting a woman and watching his friends bury her alive, was declared unconscious ten minutes after the first of the state's new three-drug lethal injection combination was administered. Three minutes later, though, he began breathing heavily, writhing, clenching his teeth and straining to lift his head off the pillow. It later emerged his vein had ruptured. The blinds were eventually lowered to prevent those in the viewing gallery from watching what was happening in the death chamber, and the state's top prison official eventually called a halt to the proceedings. Lockett died of a heart attack a short time later, the Department of Corrections said. Local media present said Mr Lockett sat up and said 'something’s wrong' 13 minutes into the procedure. 'It was a horrible thing to witness. This was totally botched,' said Lockett's attorney, David Autry. Scroll down for video . Oklahoma Department of Corrections director Robert Patton, left, called off the failed execution. Lockett was sentenced to death for shooting Stephanie Neiman, right, and watching his friends bury her alive . Witness Ziva Branstetter told broadcaster MSNBC Lockett was thrashing about and appeared to be in pain. 'His . body was sort of bucking. He was clenching his jaw. Several times he . mumbled phrases that were largely unintelligible,' she said. A Tulsa World newspaper claimed that Lockett was 'still alive,' and lifted his head as prison officials lowered the blinds. Tuesday was the first time Oklahoma used the drug midazolam as the first element in its execution drug combination. Other . states have used it before; Florida administers 500 milligrams of . midazolam as part of its three-drug combination. Oklahoma used 100 . milligrams of that drug. Republican Gov. Mary Fallin ordered stay of execution for Charles Warner who was scheduled to die two hours after Lockett . 'They should have anticipated possible problems with an untried execution protocol,' Autry said. 'Obviously . the whole thing was gummed up and botched from beginning to end. Halting the execution obviously did Lockett no good.' Republican . Gov. Mary Fallin ordered a 14-day stay of execution for an inmate who . was scheduled to die two hours after Lockett, Charles Warner. She . also ordered the state's Department of Corrections to conduct a 'full . review of Oklahoma's execution procedures to determine what happened and . why during this evening's execution.' Robert . Patton, the department's director, halted Lockett's execution about 20 . minutes after the first drug was administered. He later said there had . been vein failure. The execution began at 6:23 p.m., when officials began administering the first drug, the sedative midazolam. A doctor declared Lockett to be unconscious at 6:33 p.m. Once . an inmate is declared unconscious, the state's execution protocol calls . for the second drug, a paralytic, to be administered. The third drug in the protocol is potassium chloride, which stops the heart. 6:23 p.m. - The injection process begins. Lockett has heavy, slow blinks, laid still . 6:29 p.m. - Consistently closed his eyes . 6:30 p.m. - First check of consciousness; still conscious . 6:33 p.m. - Announced Lockett was officially unconscious . 6:34 p.m. - Lockett started to move his mouth . 6:36 p.m. - Lockett began convulsing and mumbling . 6:37 p.m. - Lockett sat up and said 'something's wrong' 6:39 p.m. - Prison officials lowered the blinds . 7:06 p.m. - Lockett dies of massive heart attack . Patton . said the second and third drugs were being administered when a problem . was noticed. He said it's unclear how much of the drugs made it into the . inmate's system. Lockett began writhing at 6:36. At 6:39, a doctor lifted the sheet that was covering the inmate to examine the injection site. 'There . was some concern at that time that the drugs were not having that . (desired) effect, and the doctor observed the line at that time and . determined the line had blown,' Patton said at a news conference . afterward, referring to Lockett's vein rupturing. After an official lowered the blinds, Patton made a series of phone calls before calling a halt to the execution. 'After . conferring with the warden, and unknown how much drugs went into him, . it was my decision at that time to stop the execution,' Patton told . reporters. Lockett was declared dead at 7:06 p.m. Autry, . Lockett's attorney, was immediately skeptical of the department's . determination the issue was limited to a problem with Lockett's vein. 'I'm . not a medical professional, but Mr. Lockett was not someone who had . compromised veins,' Autry said. 'He was in very good shape. He had large . arms and very prominent veins.' Bailey Elise McBride, who reports for the Associated Press in their Oklahoma bureau, tweeted immediately after the botched execution . 'After weeks of Oklahoma refusing to . disclose basic information about the drugs for tonight's lethal . injection procedures, tonight Clayton Lockett was tortured to death,' said Madeline Cohen, an attorney for Warner. Adam . Leathers, co-chair of the Oklahoma Coalition to Abolish the Death . Penalty, accused the state of having 'tortured a human being in an . unconstitutional experimental act of evil,' reported CNN. In . Ohio, the January execution of an inmate who made snorting and gasping . sounds led to a civil rights lawsuit by his family and calls for a . moratorium. Nightmare: Patton said the inmate was writhing on the gurney, pictured, and shaking uncontrollably about 13 minutes into the execution . Tuesday was the first time Oklahoma . used the drug midazolam as the first element in its execution drug . combination. Other states have used it before; Florida administers 500 . milligrams of midazolam as part of its three-drug combination. Oklahoma . used 100 milligrams. The . problems with the execution are likely to fuel more debate about the . ability of states to administer lethal injections that meet the U.S. Constitution's requirement they be neither cruel nor unusual punishment. That question has . drawn renewed attention from defense attorneys and death penalty . opponents in recent months, as several states scrambled to find new . sources of execution drugs because drugmakers that oppose capital . punishment - many based in Europe - have stopped selling to prisons and . corrections departments. Defense . attorneys have unsuccessfully challenged several states' policies of . shielding the identities of the new sources of their execution drugs. Missouri and Texas, like Oklahoma, have both refused to reveal their . sources, but both of those states have since successfully carried out . executions with their new supplies. The state has stood by the execution but said Monday that it's boosting the dosages of its lethal injection drugs. A . four-time felon, Lockett was convicted of shooting 19-year-old . Stephanie Neiman with a sawed-off shotgun and watching as two . accomplices buried her alive in rural Kay County in 1999 after Neiman . and a friend arrived at a home the men were robbing. Warner had been scheduled to be put to death two hours later in the same room and on the same gurney. The 46-year-old was convicted of raping and killing his roommate's 11-month-old daughter in 1997. He has maintained his innocence. Lockett . and Warner had sued the state for refusing to disclose details about . the execution drugs, including where Oklahoma obtained them. The . case, filed as a civil matter, placed Oklahoma's two highest courts at . odds and prompted calls for the impeachment of state Supreme Court . justices after the court last week issued a rare stay of execution. The . high court later dissolved its stay and dismissed the inmates' claim . that they were entitled to know the source of the drugs. By . then, Fallin had issued a stay of her own - a one-week delay in . Lockett's execution that resulted in both men being scheduled to die on . the same day. Warner was served a final meal Tuesday of 20 boneless chicken wings, potato wedges, cole slaw, two fruit cocktail cups and a 20-ounce soda. Lockett's request of steak, shrimp, a large baked potato and a Kentucky Bourbon pecan pie was denied because it exceeded the $15 limit. He declined a separate offer from the warden for a dinner from Western Sizzlin', prison officials said. Oklahoma changed its execution protocols twice this year, leaving State officials with five options for lethal injections, including a new three-drug mixture that was used for the first time Tuesday. Two of the drugs used carry warnings that they can suppress the respiratory system and the third warns that cardiac trouble can occur at high but non-lethal doses, and lists specific steps to take if a medical patient receives too much of the drug but doesn't die.
cocktail of drugs administered in a lethal officials halted Clayton Lockett's execution execution. Lockett was sentenced to death for minutes after the first drug was administered. He Lockett sat up and said 'something's wrong' 6:39 p.m. - Lockett dies of massive heart attack . denied because it exceeded the $15 limit. He