The King of Pop, who was allegedly being treated for insomnia, were lethal levels of the anesthetic propofol powerful in his body when he died, according to court documents.

Affidavit apparently revealed that Murray told LAPD detectives he had been to allow singer propofol as part of his treatment of insomnia, and feared the star was becoming dependent on drugs.

A statement for Murray search warrant in California, the following: "Los Angeles Chief Medical Examiner Medical Examiner's office, Dr. Sathyavagiswaran, said he had reviewed the preliminary results of toxicology and its preliminary assessment of the cause of Jackson's death due to lethal levels of Diprivan propofol.ackson died 50 years from an apparent heart attack at his rented LA mansion on 25 June.