Murray did not conduct drug tests on Jackson and had no way of knowing , other than from Jackson 's words , if he was taking other drugs , Chernoff 's spokeswoman , Miranda Sevcik , told CNN . `` We wanted some additional information , '' chief investigator Ed Winter said . Coroner had said it completed `` thorough '' report into Michael Jackson 's death . The coroner has been asked to review the case again and make a final determination on what happened that night in June 2009. Dr. Arnold Klein , Jackson 's dermatologist , has denied giving him dangerous drugs .
`` We wanted some additional information , '' chief investigator Ed Winter said . Coroner had said it completed `` thorough '' report into Michael Jackson 's death . The coroner has been asked to review the case again and make a final determination on what happened that night in June 2009. Dr. Arnold Klein , Jackson 's dermatologist , has denied giving him dangerous drugs .