Who Is Hannah Petty on 48 Hours? Everything You Need to Know
By Robert Thorne
When the trial opened in Knox County Criminal Court in May 2018, defense counsel argued that Gaul never intended to kill Emma Walker. The defense strategy framed Gaul’s actions as an ill-conceived, reckless bid to regain Walker’s affection. Gaul claimed he fired into the bedroom wall merely to scare her, hoping she would become frightened enough to seek his protection.
Prosecutors systematically dismantled this defense using physical evidence and peer testimony. Testifying under oath, friends including Hannah Petty walked the jury through Walker's direct rejections of Gaul’s advances. Petty confirmed that Walker had unequivocally terminated the relationship and possessed genuine fear regarding Gaul's unpredictable reactions.
Forensic trajectory analysis revealed that both gunshots were aimed directly at head level relative to where Walker’s bed stood behind the drywall. That physical alignment contradicted any claim that the weapon was fired as a mere warning shot into the air or foundation. The jury deliberated for just over four hours before rejecting the defense's lesser reckless homicide argument and convicting Gaul on all counts, including first-degree premeditated murder, aggravated stalking, theft of a firearm, and tampering with evidence.
Robert Thorne covers electric vehicle innovations, autonomous driving systems, global mobility trends, and automotive engineering developments.
