LAPD Chief William Bratton says that depending on what toxicology tests turn up, the entire nature of their investigation into Michael Jackson's death may change.
"We are still awaiting corroboration form the coroner's office as to cause of death," Bratton told CNN. "That is dependent on toxicology reports due to come back."
"Based on those reports, we will have an idea of what it is that we are dealing with. Are we dealing with a homicide or with an accidental overdose?"
Homocide. The potentially inflammatory word is not thrown around lightly by officials, and comes as the coroner's office subpoenas MJ's medical records from a number of doctors who treated him over the years, according to the Los Angeles Times.
On that list of docs? Dermatologist Arnold Klein.
"It was a standard subpoena. We turned over medical records to the medical examiner in response," attorney Richard Charnley said of the one served to Arnold Klein, who says he isn't the father of Jackson's children - as far as he knows.
Dr. Klein said on Larry King Live Wednesday night that he never prescribed Jackson anything stronger than Demerol, and that he had warned his patient against using Diprivan, a potent anesthetic that was found in Jackson's house.
Several search warrants for unidentified locations have also been issued in connection with the probe into Michael Jackson's prescription drug use.
The Drug Enforcement Administration and the California Attorney General's Office are also assisting the LAPD's investigation of Jackson's death.
The star's county-performed autopsy revealed that he had been taking prescription drugs. On June 29, the coroner's office confiscated various drugs as well as medical equipment from the Holmby Hills mansion the singer had been renting.