: What makes the Debbie Stone case notable is the public release of her autopsy report. The report was highly graphic and included detailed descriptions that many considered to be sensational and intrusive.
Deborah Gail Stone was an honors student and an accomplished athlete who had graduated from Santa Ana High School just a month prior in June 1974. Known to her friends and family as a vibrant, kind, and deeply involved student—serving on the yearbook staff and receiving the Principal’s Award—she took the summer job at Disneyland to earn money for college, which she was scheduled to attend that fall. The Attraction: The Fatal Mechanics of "America Sings" deborah gail stone autopsy report
If you are looking for more specific information on the safety measures taken after the autopsy report was released, I can search for: "Disneyland cast member safety procedures 1970s" : What makes the Debbie Stone case notable