Conversation so far:
did michael jackson start the this is it tour?
The This Is It Tour was originally scheduled to start on July 8, 2009
did Michael Jackson die before the This Is It tour?
On June 25, 2009, eighteen days before the first scheduled This Is It performance, Jackson died after cardiac arrest caused by an overdose of Propofol and benzodiazepines.
at what age did Michael Jackson die?
50
was anyone convicted as a result of Michael Jackson's death?
Jackson's personal physician was convicted of involuntary manslaughter.

Question: who was the personal physician?
Self-contained rewrite: who was Michael Jackson's personal physician?