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.

LAPD Spokeswoman Karen Rayner told FOX News that police hope the physician — whose identity police have not confirmed — can help with the investigation.

Rayner stressed that he was not under criminal investigation, but coroner's investigators wanted to contact him for more information. His car was impounded last night by police.

But other reports about the mystery doctor were far more disturbing — according to TMZ, he may have given Jackson a possibly fatal narcotic injection.

A local Houston report claims the doctor's name is Conrad Robert Murray, a cardiologist based out of Texas. The LAPD did not confirm that information.

The male on the 911 call told the emergency dispatch that the doctor was the only person at the scene when Jackson lost consciousness.

Jackson, whose fame spanned from his childhood with the legendary Jackson 5 to a superstar solo career that earned him the nickname 'King of Pop,' died Thursday afternoon at a Los Angeles hospital. He was 50.

The autopsy began at 11 a.m. EDT, though results were not likely to be final until toxicology tests could be completed.

The process could take up to six to eight weeks, Ed Winter, L.A. County Assistant Chief Coroner told reporters Friday morning.

However, if a cause can be determined by the autopsy, they will announce the results, said Los Angeles County Coroner Investigator Jerry McKibben.

There has been speculation that drugs may have played a role in the death of the icon, with TMZ citing sources who claim he was given a "heavy dose of morphine" before his death. Other reports claim that Jackson received a shot of Demerol — a similar narcotic— shortly before his death.

Brian Oxman, a former attorney of Jackson's and a family friend, said he was concerned about Jackson's use of painkillers and he warned the singer's family about possible abuse.


"I said one day, we're going to have this experience. And when Anna Nicole Smith passed away, I said we cannot have this kind of thing with Michael Jackson," Oxman said. "The result was, I warned everyone, and lo and behold, here we are. I don't know what caused his death. But I feared this day, and here we are."

Jackson died at UCLA Medical Center after being stricken at his rented home in the posh Los Angeles neighborhood of Holmby Hills. Paramedics tried to resuscitate him at his home for nearly three-quarters of an hour, then rushed him to the hospital, where doctors continued to work on him.

"It is believed he suffered cardiac arrest in his home. However, the cause of his death is unknown until results of the autopsy are known," his brother Jermaine Jackson said at a press conference Thursday.

Jackson said his brother's physician was with him at his home at the time of his suspected cardiac arrest, and both the physician and the paramedics who transported to the UCLA Medical Center attempted to resuscitate him.

"Upon arriving at the hospital at approximately 1:14 p.m. a team of doctors, including emergency physicians and cardiologists, attempted to resuscitate him for a period of more than one hour, but they were unsuccessful," he said.

Jackson was pronounced dead at at 2:26 p.m. PDT, his brother said.

"My family request that the media please respect our privacy during this time, and may all love be with you Michael, always. We love you."

Cardiac arrest is an abnormal heart rhythm that stops the heart from pumping blood to the body. It can o