The upper portion of her skull was sliced off.
Contemporary news reports and coroner’s statements indicate Mansfield’s death resulted from severe cranial and chest trauma consistent with high-speed impact and subsequent crushing forces. Some sources noted that Mansfield had been sleeping in the rear of the vehicle at the time of the crash and that the car struck the back of a tractor-trailer; emergency responders found the occupants severely injured. The coroner pronounced her dead at the scene. jayne mansfield autopsy report
Actionable steps to research the autopsy report and primary sources The upper portion of her skull was sliced off