Heath Ledger's Autopsy Inconclusive

An autopsy on Heath Ledger was inconclusive and more tests are needed, reports The Associated Press.

10 days are needed to complete the investigation, said Ellen Borakove, a spokeswoman for the medical examiner.

Just yesterday, the 28-year-old actor was found dead with sleeping pills nearby.

Carla Williams, the mother of Heath‘s former fiancee Michelle Williams, was spotted in Brooklyn earlier this morning. She was seen leaving the apartment that Michelle shared with Heath and their 2-year-old daughter, Matilda Rose, before the couple separated this past September.