Contrary to the persistent myth, the autopsy report explicitly states that However, the injuries were so severe that the rumor’s origin is understandable.

The National Highway Traffic Safety Administration (NHTSA) recognized that the primary cause of the front-seat fatalities was the lack of rear underride protection on commercial trailers. The Buick's hood passed under the truck because there was no physical barrier to stop it, allowing the trailer bed to strike the occupants directly.

The Final Moments: A Detailed Look at the Jayne Mansfield Autopsy Report and Tragic Death

The Jayne Mansfield autopsy report is a sobering historical document that separates Hollywood myth from medical fact. It confirms that the iconic actress died of massive, instantaneous head trauma rather than the sensationalized decapitation reported by tabloids. While her life was cut short in a dark mist on a Louisiana highway, the clinical investigation into her death ultimately led to safety regulations that have saved countless lives on the road today.

The report explicitly notes that her head remained attached to her body. The injuries were localized to the upper skull and brain tissue, rather than the neck.

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 report specifies a partial separation of the cranium, an injury described by medical professionals as more akin to a "scalping" than a total decapitation.

: The actress also suffered a closed fracture of the right humerus and various lower extremity injuries. Debunking the Decapitation Myth

Beyond the catastrophic cranial trauma, the autopsy report documents extensive injuries consistent with a high-velocity vehicular impact. These included: Multiple lacerations and abrasions across her body. Severe chest trauma, including fractured ribs.

In the summer of 1967, Mansfield was performing a successful nightclub engagement in Biloxi, Mississippi. After wrapping up her shows on the night of June 28, she needed to travel to New Orleans for a scheduled television appearance the following morning.

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