"Absolutely at no time are we going to be interviewing her," New York police Det. Joseph Cavitolo tells PEOPLE. "We never had any plans to interview her. At this point we are just waiting for the Medical Examiner's report."
Ledger's initial "autopsy was inconclusive," New York City Medical Examiner spokeswoman Ellen Borakove told PEOPLE on Wednesday. "We have to do further testing including toxicology and tissue testing. Neither cause of death or manner of death has been concluded. We expect additional results in 10 days to two weeks."
Police believe Ledger was already dead by the time his masseuse had phoned Olsen, and they have ruled out foul play.
Masseuse Calls OlsenStarting at 3:17 p.m. Tuesday, the day Ledger's body was discovered, masseuse Diana Wolozin spent nine minutes making three phone calls to Olsen – and waiting more than a minute between each call – before dialing 911, then called Olsen a fourth time after paramedics arrived at Ledger's New York apartment, the Associated Press has reported.
Wolozin, 40, first called Olsen after she and Ledger's housekeeper discovered him lying face down on his bed. Among Olsen's responses was that she would send her security guards to the apartment.
"There's no crime for calling Mary-Kate first," Cavitolo told PEOPLE on Friday. "There's no crime for not calling 911 initially."
Ledger, 28, and Olsen, 21, first met in the summer of 2006 and "were casually dating for three months before Heath's death," a source told PEOPLE. "They were hooking up, but neither were particularly interested in making it exclusive."
Click here for all the latest news updates on the Heath Ledger tragedy