Los Angeles Police Department officers towed the car of Michael Jackson's doctor Friday from a mansion where the entertainer had been living.
Police spokeswoman Karen Rayner said coroner's investigators wanted to talk to the doctor but said she did not know who the doctor was. She stressed the person was not under criminal investigation.
World Magazine Music critic Arsenio Orteza spoke to CBN News about Jackson's impact on the music industry and on how Christians should respond to his death. Click play to watch, following this report. Also, get more analysis here.
Click here to see a timeline of Michael Jackson's career.
"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.
The Los Angeles County coroner's office had scheduled Jackson's autopsy for Friday morning, but a spokesperson said other tests would take longer.
The official cause of death will probably not be known for several weeks.
Brian Oxman, a former Jackson attorney and a family friend, said Friday he had been concerned about Jackson's use of painkillers. He also said he had told 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 said Jackson had prescription medications to help with pain caused by a broken leg suffered after he fell off a stage and for broken vertebrae in his back.
It is suspected the singer died of cardiac arrest Thursday afternoon in Los Angeles, Calif.
World Waits for Autopsy Results
But the world will have to wait until an autopsy can be completed on Friday before it is known for sure what led to the king of pop music's death.
The news stunned just about everyone. Jackson was only 50-years-old, and the cause of death was believed to have been cardiac arrest.
His death occurred as Jackson was getting ready to begin a series of comeback tours next month, ironically to be billed as his final tour.
"This is the final curtain," Jackson said.
But as his brother announced that curtain came down too soon.
"My brother, the legendary King of Pop, Michael Jackson, passed away on Thursday," Jermaine Jackson told a packed auditorium. "It is believed he suffered cardiac arrest in his home."
Paramedics rushed to Jackson's Los Angeles home Thursday afternoon, after a frantic call for help, when Jackson stopped breathing. CPR was administered and he was rushed to the UCLA Medical Center in Los Angeles.
Within minutes of Jackson's arrival, people began arriving by the hundreds, and his death prompted reaction from around the world.
"He was always a star," Betty Wilson, a Jackson fan, told a reporter. "And the way he performed, I have seen him in concert many times, he was just a great performer."
A great performer, but scandal followed Jackson throughout his life, including accusations that he molested young boys. He was acquitted in court, but a cloud of suspicion remained over him till the end.
It is also unclear what Jackson believed about God in his final days. He had been a Jehovah's Witness for years. But in his farewell, Michael's brother, Jermaine, referred to the god of Islam.
"May Allah be with you, Michael always," Jermaine Jackson said.
Jackson was also known for his billion dollar music business. But it has been reported there were problems there, too. He reportedly died owing around $400 million in debt.