The Los Angeles County report revealed that the death of 'King of Pop' was caused by anesthesia overdose. After the announcement of final report on Jacksons death, everything is clear now about his death cause. The drugs Propofol and Lorazepam were found to be the primary drugs responsible for Mr Jacksons death. Other drugs detected were: Midazolam, Diazepam, Lidocaine and Ephedrine, the Coroner office said in a brief statement.