Mark Allen Geralds was executed on December 9, 2025, after spending over 35 years on death row for the brutal murder and torture of Tresa Lynn Petty Bonet in 1989. The execution, carried out by lethal injection at Florida State Prison, marks a significant moment in a case that has haunted the community for decades.
Geralds, a carpenter in Panama City Beach, befriended the Petty Bonet family while working on their home. However, his intentions turned sinister when he learned that Tresa would be alone, leading him to plot a robbery that escalated into murder.
On February 1, 1989, Geralds entered the Petty Bonet home using a key he had been given. He subjected Tresa to horrific torture, attempting to extract the location of $7,000 in cash. Despite his brutal methods, she never revealed the information, ultimately leading to her death from stab wounds.
The aftermath of the crime was devastating. Tresa’s young son, Bart, discovered her body upon returning home from school, a traumatic experience that would haunt him for the rest of his life. The investigation quickly turned towards Geralds, with evidence stacking against him, including items he had pawned that belonged to Tresa.
Geralds’ criminal history, including eight prior convictions, painted a picture of a man who lived a double life—appearing trustworthy while harboring violent tendencies. Charged with first-degree murder and armed robbery, he was found guilty in March 1990 and sentenced to death.
Over the years, Geralds attempted multiple appeals, but all were unsuccessful. In a surprising turn, he waived his remaining appeals shortly before his execution, indicating a desire to end the lengthy legal battle.
On execution day, Geralds awoke early and had a final visit with a spiritual adviser. The execution process began at 6:00 p.m., though it faced initial difficulties. After approximately six minutes, he was pronounced dead. Notably, he chose not to offer any last words.
While some relatives of Tresa were present to witness the execution, Bart, who had suffered immense trauma, had passed away in 2022. His absence underscores the lasting impact of Geralds’ actions on the family and community.
This execution concludes a tragic chapter in Florida’s criminal history, highlighting the complexities of justice and the profound consequences of violent crime. As the state continues its record of executions, the community reflects on the scars left by such heinous acts.