Claim: Acute drug intoxication was the cause of Michael Jackson's death.
Evidence: While preparing for his comeback concert series , This Is It , Jackson died of acute propofol and benzodiazepine intoxication on June 25 , 2009 , after suffering from cardiac arrest.
Benzodiazepines -LRB- BZD , BZs -RRB- , sometimes called `` benzos '' , are a class of psychoactive drugs whose core chemical structure is the fusion of a benzene ring and a diazepine ring.