updated 04/11/2012 AT 4:15 PM ET
•originally published 04/11/2012 AT 5:15 PM ET
As a result, the emergency operator was never able to relay CPR instructions directly to anybody in the singer’s suite at the Beverly Hilton, according to a tape of the 911 call.
Houston, 48, died of accidental drowning with cocaine use and heart disease contributing to her death, an autopsy found.
The call to the emergency operator the afternoon of Feb. 11 came from Beverly Hilton security, who had been contacted by a woman in Houston’s suite.
After security reported “an unconscious female” in a room, the dispatcher asked if he could be patched through to the woman in the room to provide CPR instructions over the phone.
“No,” replied the official, “because she keeps hanging up on us.”
Asked if Houston could’ve been saved if the 911 operator was able to give direct CPR instructions, L.A. Coroner Assistant Chief Ed Winter replied, “There’s too many unknown variables for me to comment on that.”
Meanwhile, the Beverly Hills Police Department announced its investigation of the case is now closed.
“Based on the findings of our investigation and our review of the coroner s report, we have determined that this is not a criminal matter,” a statement read.