The state of Oklahoma executed Gilbert Postelle by lethal injection on Thursday morning, ending the life of a man who, at age 19, marched four people into a backyard, made them kneel on a grassy Memorial Day afternoon, and opened fire with an assault rifle because he believed a false rumor that one of them had caused his father’s motorcycle accident. There was no evidence linking any of the victims to that crash. Four innocent people died anyway.
Postelle was pronounced dead at 10:14 a. m. inside the Oklahoma State Penitentiary in McAlester.
He offered no final words.
The execution took place after a chaotic legal battle that saw Postelle himself ask to be executed by firing squad instead of lethal injection, a request the state rejected. His last meal was McDonald’s: 20 chicken nuggets, three large fries, two chicken sandwiches, a large cola, and a caramel frappé. He declined a spiritual advisor in the chamber.
Seven witnesses sat behind the glass, watching as the convicted killer glanced at them before the drugs began to flow. At 10:06 a. m.
, a doctor entered the chamber, checked for consciousness by rubbing his sternum and shaking him. Postelle did not respond. Eight minutes later, he was dead.
The massacre that brought him to that room took place on May 30, 2005, a day that should have been a holiday for families across Oklahoma. Instead, it became known as the Memorial Day Massacre. Prosecutors said the attack was a blitz, driven by a belief that had no factual basis.
The Postelle family—Gilbert, his brother David, their father Brad, and a fourth man named Randall Wade Bias—drove to a home in Oklahoma City. Inside were Donnie Swindle, James Alderson, Terry Smith, and Amy Wright. The victims were ordered outside and told to kneel.
Gilbert Postelle used an AK-47, firing more than 30 rounds. Two of the victims, Amy Wright and James Alderson, tried to run. He shot them in the back.
At Postelle’s clemency hearing years later, a prosecutor described Amy Wright’s final moments: she was screaming, clawing at the ground, desperately trying to escape. She was hit three times in the back. There was no mercy in that yard.
None of the four victims had anything to do with a motorcycle crash that had left Brad Postelle with a severe brain injury and seizures. The family had simply decided that Donnie Swindle was responsible. They never checked the facts.
Gilbert Ray Postelle was born June 22, 1986. His mother abandoned him when he was young. By age 12, he was already using methamphetamine, introduced to it, prosecutors said, inside his own home.
By adulthood, he had been arrested at least eight times in Midwest City, Oklahoma, mostly on 𝒹𝓇𝓊𝑔 and weapons charges. His father, Brad Postelle, had his own criminal history: a 1996 𝒹𝓇𝓊𝑔 conviction and a 1999 investigation into a suspected meth operation behind the family home, though those charges were dropped. This was the environment Gilbert grew up in.
It does not excuse what he did, but it provides the backdrop for a tragedy that spiraled out of control.
The investigation into the quadruple homicide moved fast, then slow. Detectives traced a maroon van seen leaving the crime scene to Terre Haute, Indiana, and by mid-August 2005, arrests followed. David and Brad Postelle were taken into custody on August 16.
Gilbert Postelle was arrested the next day. Two other men were charged as accessories. Randall Wade Bias, the fourth shooter, eventually took a plea deal and testified against Gilbert Postelle at trial.
In 2008, a jury handed down two death sentences—for the murders of Amy Wright and James Alderson—and life without parole for the killings of Donnie Swindle and Terry Smith. His brother David received life without parole. His father, Brad, never stood trial; the same brain injury that had triggered this entire chain of events left him ruled incompetent.
He died in prison in February 2011 at age 46.
In December 2011, Oklahoma’s highest criminal court upheld Gilbert Postelle’s death sentence. But his case soon became entangled in a larger battle over Oklahoma’s execution methods. A string of botched lethal injections led to a moratorium that lasted from 2015 to 2021.
When the state announced it would resume executions, Postelle and dozens of other death row inmates fought back, arguing that the state’s 𝒹𝓇𝓊𝑔 protocol caused prisoners to feel as though they were drowning or burning alive before death. Autopsy findings from previous executions supported their claims.
In August 2021, a federal judge removed Postelle and five others from that lawsuit on a technicality: they had not named an alternative execution method. Postelle had refused to do so, citing his religious beliefs. Then in October 2021, Oklahoma executed a man named John Grant.
Witnesses said he convulsed and vomited during the process; his autopsy later showed lung weights nearly triple normal, consistent with the drowning sensation the inmates had warned about. Postelle sued again for a stay. It was denied.
In January 2022, weeks before his own execution, Postelle and another inmate made an extraordinary request: they asked to be executed by firing squad instead of lethal injection. They viewed it as more humane, even though most people consider it more violent. The Supreme Court refused to stop his execution.
Also surfacing during those court proceedings was the revelation that the state was paying an unnamed doctor $15,000 per execution plus daily training fees to oversee the lethal injection process.
On December 14, 2021, Postelle appeared before Oklahoma’s Pardon and Parole Board. His attorney argued for mercy, pointing to his intellectual disability, his abandonment as a child, his meth addiction that began at age 12. Postelle himself spoke by video link from prison.
“I do understand that I’m guilty and I accept that,” he said. “There’s nothing more that I know to say to you all that I am truly sorry for what I’ve done to all these families.” Then the board heard from Mary Jo Swindle, Donnie Swindle’s mother.
She told them she never got to see her son’s body. It was too damaged by the gunfire. The board voted 4 to 1.
Clemency denied.
On the morning of the execution, Shelly Milner, Donnie Swindle’s sister, spoke afterward. “Today did not put closure on anything,” she said. “His family grieves as our families have grieved for 17 years.
To know that he will never walk this earth again does give me a little more peace than I had yesterday.” Postelle’s fiancée, Jackie Thompson, saw it differently. She told a local news station he deserved a second chance.
“Two wrongs don’t make a right,” she said. “Executing Gilbert is not going to bring those people back. It’s only creating more victims.”
Two families, two versions of what justice looked like. Neither got the ending they wanted.
With Postelle’s death, Oklahoma executed its fourth person in four months, after nearly seven years without any executions in the state. The sequence began with John Grant in October, then Donald Grant and — before Postelle — another inmate whose name now joins a grim ledger. The state’s death chamber is operating at a pace not seen since before the moratorium.
The controversy over lethal injection methods continues, with lawsuits still pending from other death row inmates who argue the protocol remains unconstitutional.
The case of Gilbert Postelle raises questions that linger long after the gurney is wheeled away. When a killing is built on a lie that nobody bothered to check, does the length of the punishment change what was lost that day? Or is some damage simply permanent, no matter how the story ends?
Four people knelt in a backyard on a holiday afternoon, killed over an accident they had nothing to do with. A rumor became a massacre. A massacre became three destroyed families and a 17-year march toward an execution chamber in McAlester, Oklahoma.
Postelle asked to be shot rather than injected. The state said no. He died anyway without a word.
The execution was carried out under tight security, with corrections officials declining to release any additional details about the procedures. Postelle’s legal team had filed a final emergency appeal on Wednesday, arguing that his intellectual disability should have barred him from execution, citing the Supreme Court’s 2002 ruling in Atkins v. Virginia that prohibits executing the intellectually disabled.
The appeal was denied without comment. Oklahoma’s Attorney General issued a statement Thursday morning, saying, “The state has carried out the sentence imposed by a jury of his peers. Justice has been served for the victims and their families, who have waited 17 years for this day.”
But for Mary Jo Swindle, the wait never ends. Her son Donnie was 29 years old when he was gunned down. He left behind a daughter who grew up without a father.
“The pain is still there,” she said in a brief interview after the execution. “No matter what they do to him, it doesn’t bring Donnie back. But I feel like some kind of weight has been lifted.
I can breathe a little easier knowing he can’t hurt anyone else.”
Meanwhile, Jackie Thompson mourns the man she planned to marry. She said Postelle had found religion on death row, that he had become a different person, that the system failed him. “He was a human being,” she said.
“He made a terrible mistake when he was young, but he grew up. He deserved a chance to show that.” The two versions of justice—one that demanded retribution, one that pleaded for mercy—collided in the execution chamber.
In the end, the state’s version won.
Postelle’s body was taken for autopsy, as is standard procedure. The state will likely not release any detailed findings for weeks. But his case has already become part of a larger national conversation about capital punishment, especially in Oklahoma, which has one of the highest per-capita execution rates in the country.
The state’s history of botched executions, the secrecy surrounding its lethal injection protocol, and the recent flurry of death warrants have drawn criticism from human rights groups, religious leaders, and even some former corrections officials.
In the days before his death, Postelle wrote a letter to a local news station. In it, he said he had accepted his fate, but he still believed the death penalty was wrong. “I’m not making excuses for what I did,” he wrote.
“I know I hurt people. But killing me doesn’t help anyone. It just adds more pain to the world.”
The letter was short, unsigned, and undated. It was read aloud by a reporter on the morning of the execution. By then, Postelle was already dead.
The four graves in Oklahoma City remain. Amy Wright was 24. James Alderson was 39.
Terry Smith was 44. Donnie Swindle was 29. Their names are etched on a memorial plaque that sits near the site where they died.
Every Memorial Day, family members place flowers there. This year, the flowers were accompanied by a small piece of paper that read simply: “17 years. We remember.”
No one from the Postelle family has ever visited the site. Brad Postelle died in prison. David Postelle is still serving life without parole.
And now Gilbert Postelle is gone, executed by the state he terrorized two decades ago.
Whether the state’s action restores balance or merely perpetuates a cycle of violence is a question that will outlive this day. Oklahoma has more than 40 inmates still on death row. Their cases are moving through the courts.
The execution chamber in McAlester is expected to be busy again before the end of the year. For now, the story of Gilbert Postelle is over. But the story of the families he tore apart—the Swindles, the Aldersons, the Smiths, the Wrights—continues, as it must, without the man who stole their loved ones.