There are two possibilities:
1. You are thinking of the character David Gale from the movie "The Life of David Gale". This character, played by Kevin Spacey, is a fictional character who is wrongly convicted of rape and murder. The movie does not depict the character's death.
2. You are thinking of a different actor. There are several actors named "David Gale". If you can provide more information about the specific actor you are interested in, I may be able to help you find his death date.
Please clarify your question so I can assist you better.