Michael Jackson's autopsy results and toxicology results will be out by next week.
Today, it has been announced that partial autopsy results are in, but nothing will be made public until the full thing is out.

Assistant Chief Coroner Ed Winter said that partial results of the toxicology tests were in. This means that the Coroner now knows what exactly was in Michael's blood or body the day he died.
Winter also added: "I can't comment on if the brain of Michael Jackson has been returned to the family, nor any other elements of the investigation."

By next week, we'll also know why Michael Jackson passed away.
Whether too many medications or a wrong dose of the sedative Diprivan/ Propofol or anything else, it'll be out in the open by next week.