Girl murdered on Tom Sawyer's Island

[snopes]

Comment: Disneyland (CA)

When I was little c. 1970, there was a rumour that on tom sawyer island in
injun joe's cave a girl was murdered. For years after I had heard the
rumour, that cave was partially sealed off. When I was last at
disneyland, the entire cave was open.

Is it true? You did not mention it in the list of deaths at disneyland.