UPDATE: Michael Jackson's missing doctor has been found and is reportedly preparing to speak with law enforcement officials.

Los Angeles police is currently searching for a Las Vegas cardiologist who has apparently gone missing after treating Michael Jackson before his sudden death.

Dr. Conrad 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, according to LA Times.

Los Angeles police spokeswoman Karen Rayner says that police towed from Jackson's house a BMW owned by one of the superstar's doctor, according to the Associated Press.

Said Rayner: We have not been able to interview the doctor yet. His car was impounded because it may contain medications or other evidence that may assist the coroner in determining the cause of death.

Speculation is mounting that Jackson stopped breathing and suffered a heart attack after taking an injection of a morphine-based painkilling drug.

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.

Click here for the full coverage of Michael Jackson's tragic death.

Meanwhile, celebrity website TMZ, which first broke the news of Jackson's death, said sources had told them that Jackson had taken a heavy dose of morphine prior to his death.

TMZ.com reported that the doctor lived at the home. Rayner said she could not confirm that and did not know the doctor's identity.

She stressed that the doctor was not under criminal investigation but coroner's investigators wanted to contact him.

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