Conversation so far:
When did Dimebag Darrell die?
Dimebag Darrell was shot and killed by a deranged fan on December 8, 2004.
How did Dimebag Darrell die?
Dimebag Darrell was shot and killed by a deranged fan.

Question: Where was he performing?
Self-contained rewrite: Where was Dimebag Darrell performing when he was shot?