The most plausible explanation for the myth is a visual one. After the crash, the upper portion of Jayne Mansfield’s skull was so depressed that her recognizable features were gone. In the dark, with blood everywhere, seeing a crushed face and a separate body might have looked like a decapitation. Coupled with the fact that Sam Brody was decapitated, it is likely a case of mistaken identity at a gruesome scene. The Jayne Mansfield autopsy report serves a dual purpose. Legally, it records the cause of death: "Crushed chest and transection of spinal cord due to auto accident." Medically, it confirms the brutal physics of a high-speed underride collision. And historically, it acts as a corrective to one of Hollywood’s most enduring horror stories.
While Jayne Mansfield was not decapitated, the adult male in the front passenger seat—Sam Brody—was. Brody’s head was crushed by the impact with the trailer’s bumper. In the chaos, emergency responders saw a blonde wig or hair in the debris field, leading to the assumption that the famous blonde’s head was missing. Mansfield’s actual injuries, while catastrophic, were different. The official autopsy report for Jayne Mansfield is a two-page document. It is written in the detached, unemotional language of forensic medicine. There is no mention of her celebrity. She is listed as "Vera Jayne Mansfield" (her legal name) and "White, Female, Age 34." jayne mansfield autopsy report
Furthermore, the crash introduced a bizarre urban legend involving the "Bible of the Dead"—a purported occult book by Anton LaVey (whom Mansfield had reportedly dated) that was allegedly found on the dashboard. The autopsy report makes no mention of any religious or occult paraphernalia. It is a medical document, not an inventory of personal effects. The autopsy report’s clinical facts have competed for decades with the testimony of first responders. Bill Kinney, a deputy sheriff who was one of the first on the scene, claimed for years that he saw a "torn" head in the debris. However, other emergency personnel, including Dr. E.R. Kuehn (the coroner), stated that while the skull was catastrophically fractured and the brain was exposed, the scalp and soft tissue kept the head attached to the body by a "flap of skin." The most plausible explanation for the myth is a visual one