He Executed 4 Innocent People Over a Rumor | Gilbert Postelle’s Final Hours

He Executed 4 Innocent People Over a Rumor: Gilbert Postelle’s Final Hours

The state of Oklahoma executed death row inmate Gilbert Postelle this morning for a 2005 quadruple murder in Oklahoma City.

“Today ended one monster’s life who stole four innocent people’s lives. His family grieves as our families have grieved for 17 years.”

On February 17th, 2022, at the Oklahoma State Penitentiary in McAlester, Gilbert Postelle was executed by lethal injection. He was pronounced dead at 10:14 in the morning. Seven witnesses sat behind the glass waiting to hear what he’d say before he died.

Seventeen years earlier, he had walked four people into a backyard, made them kneel, and opened fire with an assault rifle. The reason he gave police was almost impossible to believe: he thought one of them had caused his father’s motorcycle accident. There was no evidence that was true. Four people died because of a rumor—a rumor Gilbert Postelle’s own family never bothered to check. By the time the truth came out in a courtroom years later, it didn’t matter anymore; the bodies were already in the ground. Whether he said a single word before the drugs took hold is part of the story ahead.

The Background of the Postelle Family

This is the story of the Postelle family, the Memorial Day Massacre, and the 17-year road that ended in an Oklahoma execution chamber.

Gilbert Ray Postelle was born on June 22nd, 1986. His mother abandoned him when he was young, and by age 12, he was already using methamphetamine—introduced to it, prosecutors say, inside his own home. By adulthood, he had been arrested at least eight times in Midwest City, Oklahoma, mostly tied to drugs and weapons.

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 eventually dropped). This was the environment Gilbert Postelle grew up in. It matters—not as an excuse, but because it serves as the backdrop for what happened next.

Sometime before May 2005, Brad Postelle was in a motorcycle accident that left him with a serious brain injury and seizures. Somehow, the Postelle family decided a man named Donnie Swindle was to blame. Prosecutors later stated there was no evidence connecting Swindle to that crash at all, but belief didn’t need evidence; it just needed a target.

The Memorial Day Massacre

On May 30th, 2005, Memorial Day, Gilbert Postelle, his brother David, his father Brad, and a fourth man, Randall Wade Bias, drove to a home in Oklahoma City. Inside were four people:

Donnie Swindle

James Alderson

Terry Smith

Amy Wright

Investigators later called it a blitz attack. The victims were marched into the yard and told to kneel. Gilbert Postelle opened fire with an AK-47, discharging more than 30 rounds. All four victims were hit. Two of them, Amy Wright and James Alderson, tried to run, but he shot them from behind.

At Postelle’s clemency hearing years later, a prosecutor described Amy Wright’s final moments:

“She was screaming, clawing at the ground, trying to get away. He heard her. He saw her trying to escape. He shot her in the back three times.”

There was no mercy in that yard. Four people died there, and none of them had anything to do with a motorcycle crash.

Investigation, Trial, and Legal Battles

The investigation moved fast, then slow. In July, detectives traced a maroon van seen leaving the crime scene, which led them to Terre Haute, Indiana. By mid-August, arrests followed: David and Brad Postelle were taken into custody on August 16th, 2005, and Gilbert Postelle was arrested the next day.

Two other men were charged as accessories, and Randall Wade Bias—the fourth shooter—eventually took a plea deal, testifying against Gilbert Postelle in exchange.

In 2008, a jury handed down two death sentences for the murders of Amy Wright and James Alderson, alongside 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 to face court. Brad died in prison in February 2011 at age 46. In December 2011, Oklahoma’s highest criminal court upheld Gilbert Postelle’s death sentence.

This is where Postelle’s case became bigger than one crime. Oklahoma’s execution chamber had a troubled history, and a string of botched lethal injections led to a moratorium lasting from 2015 to 2021. When the state announced it would resume executions, Postelle and dozens of other death row inmates fought back—not over guilt or innocence, but over how they would die. Their lawsuit pointed to autopsy findings suggesting the state’s drug protocol caused prisoners to feel as though they were drowning or burning alive before death.

In August 2021, a federal judge removed Postelle and five others from that lawsuit on a technicality because they hadn’t named an alternative execution method, which Postelle had refused to do, citing his religious beliefs. Then, in October 2021, Oklahoma executed a man named John Grant. Witnesses reported he convulsed and vomited during the process, and his autopsy later showed lung weights nearly triple normal—a sign experts said was consistent with the drowning sensation the inmates had warned about. Postelle sued again for a stay, but 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—a method most people consider more violent, though they saw it as more humane. The Supreme Court refused to stop his execution. Additionally, court proceedings revealed that the state was paying an unnamed doctor $15,000 per execution plus daily training fees to oversee the lethal injection process.

Final Days and Clemency Hearing

In December 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, and 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. There’s nothing more that I know to say to you all other than that I am truly sorry for what I’ve done to all these families.”

The board also heard from Mary Jo Swindle, Donnie Swindle’s mother, who told them she never got to see her son’s body because it was too damaged by the gunfire. Ultimately, the board voted 4 to 1, and clemency was denied.

The Final Moments and Aftermath

On the morning of February 17th, 2022, Gilbert Postelle ate his last meal from 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.

He was strapped to the gurney, arms outstretched, while seven witnesses watched from behind the glass. He glanced at them a few times as the process began and gave no final words. At 10:06 a.m., a doctor entered the chamber, checked for consciousness by rubbing his sternum, shaking him, and speaking to him. Postelle did not respond. At 10:14 a.m., Gilbert Postelle was pronounced dead.

He was the fourth person Oklahoma had executed in four months, following nearly seven years without a single execution in the state. Shelly Milner, Donnie Swindle’s sister, spoke afterward:

“Today did not put closure on anything. 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, telling a local news station that he deserved a second chance:

“Two wrongs don’t make a right. 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, and neither one got the ending they wanted. 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. Gilbert Postelle asked to be shot rather than injected; the state said no. He died anyway without a word.

So, here’s the question worth sitting with: When a killing is built on a lie 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?