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Whitney Houston death investigation closed, no signs of crime

In this Nov. 22, 2009 photo, Whitney Houston receives the International Artist Award onstage at the American Music Awards, in Los Angeles. AP

(CBS/AP) - Whitney Houston's death investigation is now closed. Beverly Hills police say they have concluded that no signs of crime occurred.

Complete Coverage: Death of a pop diva
Pictures: Whitney Houston
Read more: Coroner's report details drug signs, liquor, drowning

Lt. Mark Rosen said Wednesday the determination was made after reviewing the Grammy-winning singer's full autopsy report, which attributed her death to accidental drowning. Coroner's officials ruled heart disease and cocaine use contributed to the 48-year-old singer's death.

Houston died in a bathtub of the Beverly Hilton hotel on Feb. 11 on the eve of the Grammy Awards. She had been planning a comeback, including a starring role in the remake of the film "Sparkle," which is due for release later this year.

On Wednesday, TMZ released the 911 call placed after Houston's body was found in the bathtub.

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