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The recording of a 911 call made shortly before Michael Jackson was rushed to the hospital Thursday that reports a 50-year-old man is "not breathing" was released Friday as authorities conducted an autopsy on the pop music icon.

The autopsy began Friday morning in an attempt to clear up the mystery surrounding Jackson's untimely demise, including whether prescription drugs played a role.

"We have a personal doctor here sir, but he's not responding to anything," a man's voice can be heard telling the dispatch during the call."He's not responding to CPR or anything."

Meanwhile Friday, law enforcement officials were looking to speak with Jackson's personal live-in physician, who was briefly interviewed by detectives at the scene Thursday.