Micheal Jackson

CNN) -- The Los Angeles coroner has concluded preliminarily that singer Michael Jackson died of an overdose of propofol, a powerful sedative he was given to help him sleep, according to court documents released Monday. Los Angeles' coroner Dr. Lakshmanan Sathyavagiswaran reached that preliminary conclusion after reviewing toxicology results carried out on Jackson's blood, according to a search warrant and affidavit unsealed in Houston, Texas.
The affidavit outlines probable cause for search warrants of the offices of doctors who are believed to have treated Jackson.
The Associated Press is quoting a single law enforcement official, who says the L.A. County Coroner has ruled Michael Jackson's death a homicide. The Los Angeles County Coroner's office told CNN they had "no comment" on the report. An LAPD spokesman says the story did not come from their department.
The 32-page warrant said Dr. Conrad Murray, Jackson's personal physician, told a detective that he had been treating Jackson for insomnia for six weeks. Murray said each night he gave Jackson 50 mg of propofol, also known as Diprivan, diluted with the anesthetic lidocaine via an intravenous drip.
Worried that Jackson may have been becoming addicted to the drug, the Houston cardiologist said he attempted to wean him from it, putting together combinations of other drugs that succeeded in helping Jackson sleep during the two nights prior to his death.
But on June 25, other drugs failed to do the job, as he recounted to detectives in an hour-by-hour account that was detailed by detective Orlando Martinez of the Los Angeles Police Department