Boren's daughter, Jodie Efird, watched Thursday night's execution from the death chamber in Arkansas' Cummins Unit prison.
Jasmine asked the Greenwood family to wait outside the prison while she visited her father because prison officials would not allow them to visit Williams, Kayla Greenwood said.
She said her family, upon learning that Williams has a daughter as well as a granddaughter whom he's never met, bought the pair plane tickets to Arkansas so they could visit him one last time.
Williams expressed remorse in his final words. "Others suffering in order that I live for however much longer - that's no hope at all, not if I have truly learned my lesson to value other people's lives".
Controversy quickly erupted over what exactly happened between 10:52 and 11:05 Thursday night at the Cummins Unit. His execution however, has prompted calls for investigations after the inmate lurched and convulsed while strapped to the gurney.
The body jerked 15 times in quick succession, the AP reported, before moving five more times at a slower rate.
A spokesman for the Arkansas governor called the movements seen in Thursday's execution "an involuntary muscular reaction" that were common side effects of midazolam.
Bishop Anthony Taylor of Little Rock wrote the state's Gov. Asa Hutchinson (R) on March 1, asking him to commute the sentences of the eight men to life in prison without parole.
In most cases, the lethal injection consists of a series of three drugs-the first one that renders the prisoner unconscious, the second one that paralyses muscles and third one that stops the heart.
Arkansas will have a more hard time obtaining additional lethal injection drugs after an unprecedented court challenge by a drug distributor and possible complications during at least one of the four executions the state carried out this month, experts said. Four other prisoners who were set for execution received stays.
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According to a timeline released by the the Arkansas Department of Correction, the execution drugs were administered to Williams beginning at 10:52pm CDT and he was pronounced dead at 11:05pm. Williams' attorneys and the American Civil Liberties Union have called for a full investigation.
All of the major manufacturers of injectable midazolam have said they do not want their drugs used in executions and majority have created control systems, including contracts with third-party drug distributors prohibiting the sale of their drugs for use in lethal injections. But executions still are on hold until litigation in federal court is completed, the DPIC says.
In separate rulings earlier Thursday the US Eighth Circuit Court of Appeals denied Williams' request.
Autopsies are conducted on executed inmates, but final reports will not be done for four to six weeks, according to the chief medical examiner for the Arkansas State Crime Lab.
The drugmakers and suppliers that don't want Arkansas to use their drugs said the Department of Correction has hidden behind the state's execution secrecy law. They had committed murders in the 1990s.
Williams's death marked the state's fourth and final execution in a week, but other lethal injections are imminent. State and federal courts rejected the claims.
Kelly Kissel, another media witness who has seen ten executions, including two that have involved the controversial drug Midazolam, says he's never witnessed anything like that. The stay was granted, then recalled, and the second inmate was put to death three hours after the first.
Arkansas is facing a lawsuit from drug distributor McKesson Corp., which wants the state to return its remaining supply of vecuronium bromide.
It's unclear whether Arkansas will receive fresh supplies of midazolam after its current batch expires.
Media witnesses say there was audible "coughing and jerking" even though the microphone inside death chamber was turned off. One witness said it appeared the inmate arched his back. She said while it may not bring closure, it helps a little. Amnesty International denounced the unprecedented string of execution warrants as Arkansas' "conveyer belt of death".