It's been almost two months since Michael Jackson passed away June 25, and what once looked like an open-and-shut case has sparked a massive investigation.
What is taking so long? Many things, some deeply intertwined and confusing.
If the singer's autopsy report reveals other drugs besides the anesthesia Propofol, prosecutors will have a harder time building a case against Dr. Conrad Murray.
As Jackson's personal physician, Murray is believed to have given Propofol to Michael on what was his final morning. But it could be a difficult case to argue he killed Jackson if the star were addicted to other prescription drugs.
Reports say police found Propofol an Xanax in Jackson's autopsy.
"You have to show that the doctor knew about all of these other doctors prescribing other drugs," says one Los Angeles deputy D.A. "It's a classic problem."
Dr. Conrad Murray, who reportedly admitted to police that he gave Jackson the hospital anesthetic in the hours before his death, has not been charged with any crime, and through his attorney he has maintained his innocence.
But search warrants served on Murray for his offices and storage facilities in Nevada and Texas indicate he's the target of a manslaughter investigation.
Many anesthesiologists say it is negligent and unusual for a doctor to administer Propofol in a home setting and not in a hospital, and without proper monitoring.
Legal experts think that fact alone not be enough to prosecute Murray.