Angel Nieves Diaz: Botched Execution, Autopsy, and Moratorium

The botched execution of Angel Nieves Diaz took 34 minutes on December 13, 2006, at Florida State Prison, after the execution team pushed intravenous catheters through the veins in both of his arms and into the surrounding soft tissue. The lethal drugs pooled in his flesh instead of entering his bloodstream, leaving foot-long chemical burns on each arm and prompting Governor Jeb Bush to suspend all executions in Florida two days later.

What Went Wrong in the Chamber

Diaz was scheduled to die under Florida’s standard three-drug protocol: sodium thiopental to anesthetize, pancuronium bromide to paralyze, and potassium chloride to stop the heart. A properly run procedure was expected to last ten to fifteen minutes.

From the gurney, Diaz spoke his final words: “The state of Florida is killing an innocent person. The state of Florida is committing a crime, because I am innocent.”¹

The IV catheters in both arms had been pushed through the veins and into the underlying tissue, a failure medical staff call infiltration.² When the first full cycle of three drugs failed to kill him, the team ran the entire sequence a second time, switching between arms.

Witnesses watched Diaz struggle for more than half an hour. He grimaced and appeared to speak at the start. At ten minutes he squinted, lifted his chin, and coughed. His mouth was still moving at sixteen minutes. At twenty-four minutes his body jolted and his eyes opened wide. One observer described his mouth as “flexing like a fish out of water.”² Neal Dupree, Diaz’s attorney and an execution witness, later swore in an affidavit: “It was my observation that he was in pain. His face was contorted, and he grimaced on several occasions. His Adam’s apple bobbed up and down continually, and his jaw was clenched.”³

What the Autopsy Found

Medical Examiner William F. Hamilton’s autopsy revealed the physical cost of the infiltration. Because the drugs entered tissue rather than the bloodstream, they produced severe chemical burns: a 12-by-5-inch burn zone on the right arm and an 11-by-7-inch zone on the left.² The sites showed fluid-filled blisters and extensive skin slippage, where the top layer of skin separated from the tissue beneath. Dr. Jonathan Groner, a professor of clinical surgery at Ohio State University, compared the injuries to those of someone who had “fallen in a campfire or set his arm on fire.”⁴

Sodium thiopental does not produce anesthesia when injected into tissue. Medical experts concluded Diaz was likely conscious as the paralytic agent took effect, meaning he may have experienced suffocation while unable to move or cry out.

Who Angel Nieves Diaz Was

Diaz was born on August 31, 1951, in Puerto Rico. He was sentenced to death in Florida for the 1979 killing of Joseph Nagy, the 49-year-old manager of the Velvet Swing Lounge, a Miami strip club. On December 22, 1979, three armed men robbed the club. Nagy was shot once in the chest with a silencer-equipped handgun. No one witnessed the shot itself; patrons and employees had been forced into a restroom, and a dancer hiding under the bar did not see who fired.¹

The case went unsolved until January 1984, when Diaz and co-defendant Angel “Sammy” Toro were indicted. A third suspect, known only as “Willie,” was never identified. Toro was already serving a life sentence in Wisconsin for another murder.⁵ Diaz and Toro accused each other of being the shooter. A 1984 prosecutor’s memorandum cited by Amnesty International stated that “Defendant Toro shot Nagy once in the chest causing his death.”⁶

Diaz represented himself from opening statements through the guilt phase of his 1984 trial in Miami-Dade County, with standby counsel assisting; appointed attorneys handled jury selection and the penalty phase.⁷ His advocates later argued that his limited English and lack of legal training made the trial fundamentally unfair.⁶

The prosecution’s case rested heavily on Ralph Gajus, a jailhouse informant who testified that Diaz had used hand gestures indicating he shot Nagy in the chest. On cross-examination, Gajus admitted he was “inferring” this from the motions rather than any direct statement.⁷ The jury convicted Diaz of first-degree premeditated murder and related charges, and he was sentenced to death on January 24, 1986, by a jury vote of eight to four. Toro pleaded guilty to second-degree murder and received a life sentence.¹

Years after trial, Gajus provided an affidavit stating Diaz never explicitly said he shot the victim and that Gajus had been angry at being excluded from a planned escape. The Florida Supreme Court rejected the affidavit, finding it consistent with the original testimony and noting that the sentencing judge had said whether Diaz was the shooter or an accomplice did not change the sentence given his role in the robbery and kidnapping.⁷ Diaz maintained his innocence to the end.

The Moratorium and the Commission

On December 15, 2006, two days after the execution, Governor Jeb Bush issued Executive Order 06-260, suspending all executions in Florida and halting the signing of further death warrants. The order created an eleven-member Commission on Administration of Lethal Injection to review the Department of Corrections’ procedures.⁸

The commission’s findings were blunt. The execution team had failed to follow established protocols, failed to ensure proper IV access, and lacked adequate training. Commission member Judge Stan Morris described “confusion” in the chain of command and noted that the warden had deferred to others during the procedure.⁹ The commission said it was “impossible to reach a conclusion as to whether inmate Angel Diaz was in pain,” partly because witness accounts conflicted and the commission lacked subpoena power to compel full testimony from the anonymous execution team.¹⁰

The commission recommended that Governor Charlie Crist, who took office in January 2007, consider changing the chemicals used in executions and evaluate whether paralytic drugs like pancuronium bromide should continue to be used at all. It also called for procedures to confirm the condemned person is fully unconscious before the second and third drugs are given, and for proper medical training of execution team members.⁹

New Protocols and the Return of Executions

The Florida Department of Corrections revised its execution procedures effective May 9, 2007, with further updates in August 2007. The warden was now required to personally oversee the procedure and verify the inmate was unconscious before the execution could continue past the first drug. Cameras were installed in the chamber. Team members had to undergo specialized training and certification, and contingency plans were put in place for complications.¹¹ Florida kept the three-drug approach, though a 2017 revision later swapped in etomidate as the initial anesthetic.¹²

The revised protocols were challenged almost immediately. In Lightbourne v. McCollum, decided unanimously by the Florida Supreme Court on November 1, 2007, the court upheld the new procedures after a thirteen-day evidentiary hearing, finding that the petitioner had failed to show a “substantial, foreseeable or unnecessary risk of pain.”¹³ A de facto national moratorium continued until the U.S. Supreme Court decided Baze v. Rees in April 2008, upholding a similar three-drug protocol in Kentucky.

Florida carried out its first execution in more than eighteen months on July 1, 2008, when Mark Dean Schwab was put to death in a redesigned chamber with improved IV monitoring.¹⁴

The Case in Scientific and Advocacy Debate

A 2007 study in PLOS Medicine by Teresa Zimmers and colleagues cited the Diaz execution as evidence that the “conventional view of lethal injection leading to an invariably peaceful and painless death is questionable.” The researchers argued that when IV catheters are misplaced, the paralytic becomes the effective cause of death, with the inmate dying by suffocation while potentially conscious and feeling the burn of potassium chloride.¹⁵ The study built on a 2005 Lancet article documenting the lack of anesthetic training among prison execution personnel.¹⁶

Amnesty International cited the execution in its campaign against capital punishment, arguing there is “no ‘humane’ way to kill” and issuing multiple reports on the recanted testimony, the innocence claim, and the autopsy findings.¹⁷ Austin Sarat of Amherst College placed the Diaz case within a broader pattern, citing data that nearly seven percent of all lethal injections have been visibly botched.²

1
Clark County Prosecutor. Angel Nieves Diaz
2
New Republic. Lethal Injection Photos: Angel Diaz’s Botched Execution
3
The Guardian. Florida Botched Execution Report
4
Death Penalty Information Center. Autopsy Photos From Botched Florida Execution Released
5
Miami New Times. Executing Angel
6
Amnesty International. Angel Nieves Diaz Case Report
7
FindLaw. Diaz v. State, SC06-2259
8
ACLU. Executive Order 06-260
9
NPR. Florida’s 3-Month Execution Ban Lapses
10
Death Penalty Information Center. Commission on Administration of Lethal Injection Final Report
11
Prison Legal News. Florida Lethal Injection Methods Revised
12
St. Thomas Law Review. Florida Lethal Injection Protocol Changes
13
Gainesville Sun. Court Upholds Lethal Injection
14
Gainesville Sun. Florida Execution Finished
15
PLOS Medicine. Lethal Injection for Execution: Chemical Asphyxiation?
16
National Center for Biotechnology Information. Lethal Injection and Medical Ethics
17
Amnesty International. Five Reasons to Abolish the Death Penalty