A Missouri man convicted of murdering a six-year-old girl in 2002 was put to death by lethal injection Tuesday evening, after the United States Supreme Court rejected a last-ditch appeal that questioned whether he was mentally competent enough to understand why he was being executed.
Johnny Johnson, 45, was pronounced dead at 6:33 p. m. Central Time at the Eastern Reception, Diagnostic and Correctional Center in Bonne Terre, Missouri.
He was the fourth person executed in the state this year and the sixteenth in the nation.
The execution concluded a legal battle that stretched more than two decades and reached the highest court in the land, ultimately turning not on whether Johnson had committed the brutal murder of Casey Williamson, but on a far more ambiguous question: whether his severe and untreated schizophrenia had left him unable to rationally grasp the connection between his crime and his punishment.
Johnson’s attorneys had argued that decades of deteriorating mental health meant their client no longer understood that the state was executing him for killing a child. Instead, they said, he believed Satan was using Missouri as a tool to bring about the end of the world. Prosecutors and Governor Mike Parson rejected that claim, and the courts ultimately ruled that Johnson had not met the legal threshold to halt his execution.
Three Supreme Court justices dissented from the decision to deny Johnson’s emergency request, warning that the nation was about to execute a man without ever holding a proper hearing to determine whether he comprehended what was happening to him. Justice Sonia Sotomayor, writing for the dissent, said Johnson had presented extensive evidence of potential incompetency, including decades of documented psychiatric history, and was entitled to a hearing before any court allowed the execution to proceed.
But the majority of the court declined to intervene, and Johnson was led into the execution chamber shortly after 6 p. m. Witnesses included members of Casey Williamson’s family, the former prosecutor who had handled the case, and one of the original investigators.
They watched as Johnson turned his head toward his spiritual advisor, a retired priest named Father Jerry Kleba, who had accompanied him in his final weeks. He was administered a single dose of pentobarbital. Within minutes, he was declared dead.
To understand how a case that involved no doubt about guilt reached the nation’s highest court, it is necessary to go back more than twenty years to a small Missouri suburb where a family trusted a friend who had been part of their lives for years.
Valley Park sits along the Meramec River southwest of St. Louis, a close-knit community where families have known each other for generations. On the evening of July 25, 2002, the Williamson family held a backyard barbecue.
Johnny Johnson was not a stranger. His older sister had grown up alongside Casey’s mother, and the family had known him since he was a boy. When the barbecue ended, Johnson did not have a place to go, so the family offered him their couch.
Casey Williamson, who was six years old, went to sleep that night in the living room of the home where she was staying with her father. She was described by those who loved her as a bright and lively girl who filled a room the moment she walked into it. Her parents were separated but remained close, and Casey moved easily between two households surrounded by grandparents, aunts, and a large extended family.
The next morning, her father woke around 7 a. m. and saw Casey in the kitchen still in her nightgown.
It was the last time he saw her alive. When he realized she was gone and that Johnson was also missing, the quiet unease of a parent who has momentarily lost sight of a child turned quickly into something else.
Within hours, the entire community was searching. Witnesses came forward describing a man matching Johnson’s description carrying a little girl on his shoulders, walking toward an abandoned glass factory on the edge of town. Detectives located Johnson later that day.
He confessed and led them to where Casey’s body had been left at the factory.
In his confession, Johnson admitted that he had lured the child away from the house, taken her to the factory, and that when he attempted to sexually assault her, she screamed and fought to get away. The attack that followed ended her life. Investigators recovered evidence that Johnson had gone to the nearby Meramec River afterward, apparently trying to wash away what had happened before he was found.
For a small community built on the kind of familiarity that makes people feel safe, the betrayal cut in two directions at once. The loss of a six-year-old girl and the realization that the danger had never come from a stranger at all.
Johnson’s psychiatric history stretched back to childhood. He had suffered head injuries before the age of ten, struggled with learning disabilities, and had been hospitalized for mental health issues for the first time at age fourteen. By eighteen, he had been hospitalized four times, eventually diagnosed with schizophrenia and later schizoaffective disorder, a condition combining features of schizophrenia with mood disorder symptoms that often includes hallucinations and delusional thinking.
None of that history was visible on the evening of the barbecue. To the people gathered there, Johnson was simply a familiar face. But that history would become the central issue in a legal fight that lasted for two decades.
At trial, Johnson’s defense did not dispute the facts of the crime. Instead, his attorneys built their case around his mental illness, arguing that the severity of his condition meant he could not have formed the deliberate intent required for first-degree murder. The prosecution countered with expert testimony that Johnson, despite his diagnosis, had been capable of understanding what he was doing and making the choice to do it anyway.
The jury convicted him, and in March 2005, Johnson was formally sentenced to death. But what began as a resolution quickly turned into a long, grinding process of appeals that stretched year after year. Johnson’s attorneys challenged his conviction and sentence on multiple grounds, revisiting the psychiatric evidence and questioning trial procedures.
As the years went on, the focus shifted from what Johnson had been capable of at the time of the crime to what he had become after twenty years on death row.
Advocacy groups took up his case, including Missourians to Abolish the Death Penalty and Amnesty International, which issued an urgent action alert arguing that executing someone with severe mental disabilities violated international human rights standards. The state of Missouri, by contrast, maintained that Johnson had received adequate mental health care and that his condition did not meet the legal threshold required to spare him.
The legal standard that governed Johnson’s final appeals traces back to the 1986 Supreme Court case Ford v. Wainwright, which held that executing someone who has lost their sanity violates the Eighth Amendment’s ban on cruel and unusual punishment. A later case, Panetti v.
Quarterman, refined that standard to cover people whose mental illness so distorts their thinking that they lack a rational understanding of the connection between their crime and their punishment.
In early 2023, a neuropsychiatrist retained by Johnson’s defense team evaluated him and concluded that while Johnson understood he had been convicted of murder, he did not rationally grasp why the state was preparing to execute him. The evaluation stated that Johnson believed Satan was using Missouri as an instrument to carry out his death as part of a broader delusion about the end of the world.
The state challenged that evaluation, pointing to records from the prison’s own mental health staff, who reported that Johnson had never expressed such delusional beliefs. The head of mental health at Johnson’s facility maintained that his condition had never manifested in the way his attorneys claimed.
The case moved rapidly through the courts as the execution date approached. The Missouri Supreme Court rejected Johnson’s competency claim. A three-judge panel of the Eighth Circuit Court of Appeals granted a temporary stay, but the full circuit reversed that decision and cleared the way for the execution.
With no lower court willing to intervene, Johnson’s attorneys took the case to the U. S. Supreme Court, which denied the request on the evening of August 1.
Casey Williamson’s family did not speak with one voice about the execution. Her father, Ernie Williamson, had made clear through the clemency process that he personally opposed the death penalty, even in his own daughter’s case. Other family members felt differently.
Casey’s great aunt, Della Steel, had written an emotional plea to the governor urging that the execution move forward. Casey’s mother told reporters in the final days that she was ready to put this part of it behind her.
The case also revealed the long ripple effects of the loss. Casey’s older sister, who was twelve at the time of the murder, died of a substance overdose in 2015, a loss attributed in part to the unresolved grief. Two younger siblings grew up carrying their own struggles.
Even Casey’s grandfather turned to alcohol under the weight of the tragedy and did not live to see the case reach its conclusion.
In the years after her death, loved ones established a scholarship in Casey’s name and organized an annual community safety fair that provides child identification kits to local families. It is a direct, tangible response to the tragedy that took her from them.
As the execution proceeded, Johnson was held at the Eastern Reception, Diagnostic and Correctional Center in Bonne Terre. Father Jerry Kleba, a retired priest, served as his spiritual advisor, visiting him regularly and bringing him communion. Johnson requested a last meal of a bacon cheeseburger, curly fries, and a strawberry shake.
In a brief handwritten statement released by the Department of Corrections, he expressed remorse.
At 6:33 p. m. , Johnson was pronounced dead.
The execution closed a chapter that had occupied the lives of many people for more than half of Casey Williamson’s would-be lifetime. But the questions his case raised about mental illness and capital punishment remain far from settled. They will almost certainly resurface in future courtrooms, argued by future attorneys standing where Johnson’s once stood.
And the grief his crime caused in Valley Park will not end with a court’s timeline or the closing of the execution chamber doors. It will simply change shape, as grief does, over the years that follow.
