Transcript for Whitney Houston: How Did She Die?
-- autopsy results may not be released four weeks so there's a lot of speculation about what exactly happened. NBC's Jim on the line is at the scene of the tragedy at the Beverly Hilton in Los Angeles morning Jim. Good morning Robin ABC news has learned that police in corners investigators found only a small amount of prescription drugs in Whitney Houston -- And now they must depend upon toxicology reports that are weeks away determine if those drugs had anything to do with her death. A vigil for Whitney Houston in central Los Angeles. So there will never be another witness but -- fans more there are still questions about what killed the 48 year old struggling superstar. ABC news has confirmed it was Houston's aunt. Mary Jones who found -- in the bathtub and tried to revive -- before paramedics were on the scene. Quarters investigators no prescription drugs including an antibiotic and Valium were found in her bathroom. And they know there was alcohol. These pictures obtained by TMC show evidence of champagne and Heineken in this week in on the floor next to the -- where she died. What investigators don't know is how much was in her body. And until toxicology comes back they will not determine the precise cause of death. No matter what medications they're taking until we run -- -- see the level. And what's in the system we're not going to speculate. Beverly hills police say it's a quarters death investigation at this time not a murder investigation. And sources tell ABC news there were no signs of trauma or foul play or illegal drugs in the room. As of right now it's not a criminal investigation. The police -- -- offices say despite reports to the contrary they have released no information about how Houston -- Your officers told the family. Any cause of death. We don't know the cause of death would not everyday that you -- read -- -- and while there were accounts of erratic behavior by Houston in the build up for the grammys friends say she was fine. Movie producer Harvey Mason was working letter comeback film sparkle and saw her just last week. She seemed -- she was. Be very optimistic and very excited about the project. ABC news has been told it was in fact Whitney Houston's aunt Mary who first pulled her from the tub. And then tried CPR on her it was twenty minutes of efforts by people around Whitney Houston while she was on the bathroom floor. None of -- of course was successful.
This transcript has been automatically generated and may not be 100% accurate.