Michael Jackson's doctor has been identified as Dr. Conrad Robert Murray and is now preparing to speak with law enforcement officials regarding Michael Jackson's death, according to celebrity site, TMZ.

Dr. Murray, 51, who is licensed in Texas, Nevada and California, was administering CPR to the performer Thursday when paramedics arrived at his rented Holmby Hills home.

Members of Jackson's entourage told hospital staff that he had taken the drug Demerol, a commercial name for pethidine.

The Sun newspaper quoted a source as saying: Shortly after taking the Demerol he started to experience slow shallow breathing. His breathing gradually got slower and slower until it stopped.

Sources told TMZ that Jackson had taken a heavy dose of morphine prior to his death.

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Check out cute photos of a younger Michael Jackson when he was in The Jackson 5