Conversation so far:
How did Ernie Kovacs die?
Kovacs was killed in a car accident.
When did he die?
early morning hours of January 13, 1962.
Were drugs or alcohol involved?
CANNOTANSWER.
Was he the only person to die in the car accident?
CANNOTANSWER.

Question: What caused his car accident?
Self-contained rewrite: What caused Ernie Kovacs' car accident?