Michael Jackson: The Investigation

MYFOXNY.COM - A source told the Associated Press that Michael Jackson died of a heart attack. But what caused the heart attack is unclear. The coroner has completed an autopsy, but toxicology report will take more time.

A person close to the family tells The Associated Press that they are contemplating funeral arrangements and how to care for his three children.

The L.A. County coroner has released the pop superstar's body to the family.

Meanwhile, family members are said to be feeling confused, upset and angry about the lack of information about who was around the singer in his final days. The AP source says Jackson's family wants to know more specifics about the role of concert promoter AEG. The company had been planning a 50-date concert series in London's 02 Arena. The family also wants to know more about the role of his advisers and representatives, who they believe were put in place by the promoter.

Doctors are speculating that a cocktail of drugs, stress and perhaps a strict diet contributed to Jackson's heart attack.

Now investigators in L.A. have questions about how he died, and who was there. What happened on the day Michael Jackson died? Police want to talk again to Jackson's doctor, Dr. Conrad Murray, who disappeared after talking to investigators Thursday at Jackson's home, where he was staying.

Police impounded Murray's car. Cops say they are looking for medication or other evidence that could assist the coroner in determining the cause of Jackson's death.

>LISTEN TO 911 CALL

Police also want to talk to the mystery 911 caller, who spoke as Jackson's doctor frantically tried to revive him.

Sources have said that Jackson has a history of prescription drug abuse, and people close to the family suggest it may have caused his heart to shut down.

Jackson began using prescription medication in 1984 after being burned during the filming of a Pepsi commercial, and seems to have relied on them ever since.