When did Dolores Mantez die?

There is no publicly available information about a person named Dolores Mantez, and therefore, no information about her death.

It's possible that:

* The name is misspelled: Double-check the spelling.

* She is not a public figure: If Dolores Mantez is a private individual, information about her death would not be publicly available.

Please provide more context or information about Dolores Mantez so I can help you find the information you need.