Introduction
David Joseph Pittman, a 63-year-old death row inmate, was executed by lethal injection on September 17, marking the 12th execution in Florida this year. Pittman had spent over 30 years on death row for the brutal murders of his ex-wife’s parents, Clarence and Barbara Knowles, and their 20-year-old daughter, Bonnie, in the early 1990s. Despite being convicted for these heinous crimes, Pittman always maintained his innocence, making a haunting claim in his final words before his death. This article delves into the details of Pittman’s case, the final moments before his execution, and the controversy surrounding his intellectual capacity and claims of innocence.
The Crime and Conviction
In the early hours of the morning, Clarence, Barbara, and Bonnie Knowles were brutally stabbed in their home, and their house was set on fire. Authorities accused David Pittman of carrying out the murders due to a personal vendetta. Pittman had been married to Bonnie Knowles and, according to reports, was angry about their divorce. The crime shocked the community and led to Pittman’s arrest.
The death row inmate died by lethal injection this week (Getty Stock Image)
He was convicted for the murders in the 1990s, with prosecutors presenting a case that he had methodically planned the killings. They claimed that Pittman had cut the phone lines before entering the house, killing all three victims, and then setting the home on fire to cover his tracks. The prosecution argued that the murders were driven by Pittman’s desire to get revenge on his ex-wife’s family.
Despite the evidence against him, Pittman always maintained his innocence. He consistently claimed that he was wrongfully convicted and that he did not commit the murders. His defense team argued that his intellectual capacity should have been taken into consideration when determining his guilt.
Pittman’s Final Words
In the final moments before his execution, David Pittman made a chilling statement. His words, directed at the witnesses present at the execution, were: “I know you all came to watch an innocent man be murdered by the State of Florida. I am innocent. I didn’t kill anybody. That’s it.”
These words echoed his long-standing assertion of innocence. While many convicted criminals on death row offer apologies or express remorse for their actions, Pittman’s declaration only reinforced his belief that he had been wrongfully convicted. His final statement left many questioning the fairness of the legal process and whether justice had been truly served.

David Joseph Pittman was convicted of the murders of 3 people (Florida Department of Correction)
Intellectual Disability and Legal Controversy
One of the central issues in Pittman’s case was his intellectual capacity. His legal team had argued that he was intellectually disabled, with an IQ of 70, and thus should not have been subjected to execution. Under the U.S. Constitution, individuals who are deemed intellectually disabled cannot be executed. The American Psychiatric Association defines intellectual disability as a condition characterized by an IQ of less than 70, which Pittman’s attorneys argued should have prevented his execution.
The American Association on Intellectual and Developmental Disabilities also states that an IQ score around 70 or lower suggests significant limitations in intellectual functioning, which may impact an individual’s ability to fully comprehend the consequences of their actions.
Despite these arguments, a judge dismissed Pittman’s claims, asserting that there was strong evidence suggesting he had planned the murders. The Florida Attorney General’s Office argued that Pittman had shown “adaptive function” by methodically carrying out the murders, including cutting the telephone lines and setting fire to the house. They claimed that such actions demonstrated a level of cognitive ability that contradicted the argument of intellectual disability.
The Debate Over the Death Penalty
Pittman’s case brings to the forefront a long-standing debate over the use of the death penalty in the United States, particularly in cases where there are questions about the defendant’s intellectual capacity. The U.S. Supreme Court has ruled that it is unconstitutional to execute individuals who are deemed intellectually disabled. However, the definition of intellectual disability and the standards for determining whether a defendant qualifies for this protection remain controversial.
Critics of the death penalty argue that there is always the risk of executing an innocent person, especially when doubts about intellectual disability or other mitigating factors arise. Pittman’s case is a stark reminder of the potential flaws in the justice system and the irreversible consequences of a death sentence.
Final Thoughts on Pittman’s Execution
David Joseph Pittman’s execution has left many with lingering questions about the fairness of his trial and the ethical implications of executing someone who claims to be innocent. While the evidence against him seemed strong, his intellectual disability claims and his final words cast doubt on whether the punishment fit the crime.
As the U.S. continues to grapple with the moral and legal questions surrounding the death penalty, cases like Pittman’s challenge us to consider whether our justice system is truly capable of delivering fair and just outcomes, especially when intellectual disabilities and questions of innocence are involved.
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In the case of David Pittman, his story serves as a tragic reminder of the flaws and complexities of our justice system, urging us to reflect on the profound implications of capital punishment.