LOS ANGELES – Police towed a BMW belonging to a doctor from Michael Jackson’s home Friday and said it could contain drugs or other evidence offering clues in the pop star’s death.

Los Angeles police spokeswoman Karen Rayner said coroner’s investigators were seeking to interview the doctor but stressed that he was not under criminal investigation.

“His car was impounded because it may contain medications or other evidence that may assist the coroner in determining the cause of death,” Rayner said.

Meanwhile the Los Angeles Fire Department released the 911 call from Michael Jackson’s home on Friday. The unidentified caller says the singer wasn’t breathing or responding to efforts to revive him.

The caller said Jackson was with his personal doctor at the time. The Los Angeles Times has identified the physician as Dr. Conrad Murray, 51, a Las Vegas cardiologist, and reports that Murray was administering CPR to Jackson when paramedics arrived.

The newspaper cites other published reports saying Jackson had received a shot of Demerol before going into cardiac arrest.

Medical examiners prepared an autopsy for Jackson as a chorus of grief spread around the world, from statesmen to icons of music to legions of fans.

“I can’t stop crying. This is too sudden and shocking,” said Diana Ross, who helped launch Jackson’s career. “I am unable to imagine this. My heart is hurting.”

Los Angeles County coroner’s watch commander Lt. Brian Elias said Friday morning the autopsy would begin shortly and take several hours, but he said other tests would take longer and determining the official cause of death would take weeks or more.

Painkillers a concern
Brian Oxman, a former Jackson attorney and a family friend, said Friday he had been concerned about Jackson’s use of painkillers and had 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 on NBC’s “Today” show. “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.”

Oxman claimed Jackson had prescription drugs at his disposal to help with pain suffered when he broke his leg after he fell off a stage and for broken vertebrae in his back.

After Jackson was acquitted on child molestation charges in 2005, prosecutors argued against returning to Jackson items including syringes, the drug Demerol and prescriptions for various drugs, mainly antibiotics, in different people’s names.

Singer was prepping comeback
Jackson died Thursday afternoon 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 for three-quarters of an hour there before rushing him to the hospital.

His brother Jermaine said Jackson apparently suffered cardiac arrest, an abnormal heart rhythm that stops the heart from pumping blood to the body. It can occur after a heart attack or be caused by other heart problems.

Jackson was preparing for a monster comeback bid — a series of 50 concerts that was to begin next month in London.

A handful of bleary-eyed fans camped out throughout the night with media outside the Jackson family house in the San Fernando Valley and near his star on the Hollywood Walk of Fame. People heading to work in New York stopped to pay respects outside Harlem’s Apollo Theater, where Jackson performed as a child.

“When the autopsy comes, all hell’s going to break loose, so thank God we’re celebrating him now,” Liza Minnelli told CBS’ “The Early Show” by telephone.

A producer said Sunday’s BET Awards would be dedicated to Jackson because of his influence on music and pop culture.

“This is going to be the first gathering of people who really cared for and were influenced by him since his death,” said Stephen Hill, an executive producer for the awards. “It’s a tall order for us but we have every intention of paying respect to Michael Jackson.”

Hill said he expects acceptance speeches to be dedicated to Jackson’s memory and the influence he had on the artists.

A screening of Universal Pictures’ “Bruno” in Los Angeles on Thursday night cut a scene involving Jackson’s sister La Toya.

NBC News contributed to this report. BY MSNBC