The investigation into the death of Brittany Murphy has taken an unexpected turn as the L.A. County Coroner's Office tries to fill in key gaps in her medical history.

The actress, who died December 20 at the age of 32, was suffering from severe anemia and other conditions and was under a physician's care, according to TMZ.

The Coroner's Office received medical files from Murphy's doctor, but they show her last visit was months before her death. But someone else was treating her.

The pathologist assigned to the case has been told by Brittany Murphy's friends and family members that other doctors treated Murphy during her final months.

Officials believe these other doctors could help determine her medical condition leading up to her death, and shed light on what, if any, medications she was on.

Brittany Murphy (1977-2009) with husband Simon Monjack.

The toxicology report is not completed, but when it is, the coroner will determine if the medications in Murphy's system were prescribed to her or someone else.

Investigators found numerous medications in Murphy's home after her death.

The mystery comes because those medications were prescribed to Murphy, her husband Simon Monjack, her mom Sharon, and "unidentified third party names."

Monjack has said, in several of his many interviews since Murphy's death, that the meds were his. But it doesn't appear to be case, at least not exclusively.

Dude's also suing Warner Brothers for wrongful her death. What a nut job.

In any case, the Coroner's Office is not expected to release the official cause of Brittany's death for weeks, with these various loose ends needing to be tied.