(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. A search warrant filed in court showed toxicology reports found propofol in Michael Jackson's body. 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, used to outline probable cause for search warrants of the offices of doctors who are believed to have treated Jackson, disclosed many details of drugs given to Jackson in the weeks before his death.
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NEW: Murray's lawyer denies accuracy of police timeline
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Documents: Doctor gave Valium, Ativan, Versed before propofol
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Dr. Conrad Murray said he was trying to wean Michael Jackson off propofol
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Murray claims Jackson demanded propofol when other drugs didn't work
-- At about 3 a.m., @placeholder then administered 2 mg of the sedative Versed.