Conversation so far:
How did Jascha Heifetz's career start?
On 27 October 1917, Heifetz played for the first time in the United States, at Carnegie Hall in New York, and became an immediate sensation.
Did he ever release an album?
CANNOTANSWER.
Did he ever release music?
CANNOTANSWER.

Question: Did he ever retire?
Self-contained rewrite: Did Jascha Heifetz ever retire?