By ANTHONY MCCARTNEY, Associated Press
LOS ANGELES -- Detectives found white powdery substances and a spoon with white residue in the hotel room where Whitney Houston died, according to the final autopsy report released Wednesday.
Houston had cocaine throughout her system when she died, the report said, and a "spoon with a white crystal like substance in it, a rolled up piece of white paper from off the top of a counter along the east wall of the bathroom" were found. The report does not specifically identify the substances as cocaine, although the drug was found in toxicology tests in Houston's heart and extremities.
Assistant Chief Coroner Ed Winter said he could not discuss how recently Houston may have used the drug.
Beverly Hills Police Lt. Mark Rosen said their investigation is still open and he could not comment on the findings.
On her final day alive, Houston complained of a sore throat, and an assistant suggested she take a bath before preparing for a pre-Grammy party, according to the report.
The Grammy-winning singer died Feb. 11 after drowning in a bathtub at the Beverly Hilton Hotel. Her death has been ruled as accidental and coroner's officials cited heart disease and cocaine use as contributing factors.
Her death came just hours before a pre-Grammy gala thrown by her mentor Clive Davis. She was attempting another comeback by starring in a remake of the film "Sparkle," in which she plays the mother of three girls who form a singing group and struggle with fame and drug addiction.
A trailer released Monday featured Houston prominently, including a snippet of her performance of the classic gospel song "His Eye Is on the Sparrow."
Toxicology results also showed Houston had marijuana, Xanax, the muscle relaxant Flexeril, and the allergy medication Benadryl in her system.
The singer also had buildup of plaque in her arteries that can restrict blood flow. Winter has said the condition is common in drug users.
The singer had battled addiction for years, but friends and family have said she appeared committed to making a comeback in the months before her death.
"The biggest devil is me. I'm either my best friend or my worst enemy," Houston told ABC's Diane Sawyer in an infamous 2002 television interview with then-husband Bobby Brown by her side.
Singers Whitney Houston (L) and Dionne Warwick perform onstage during the 2011 Pre-Grammy Gala & Salute to Industry Icons, with Clive Davis Honoring David Geffen at the Beverly Hilton on February 12, 2011. The event, on the eve of the 53rd Annual GRAMMY, honored Geffen Records founder and DreamWorks SKG co-founder David Geffen who was presented with the President's Merit Award in recognition of his significant contributions to the music industry and the impact his efforts have had on music and the business of music. AFP PHOTO / Mark RALSTON (Photo credit should read MARK RALSTON/AFP/Getty Images)
BEVERLY HILLS, CA - FEBRUARY 12: (EXCLUSIVE COVERAGE) Whitney Houston attends the 2011 Pre-GRAMMY Gala and Salute To Industry Icons Honoring David Geffen at Beverly Hilton on February 12, 2011 in Beverly Hills, California. (Photo by Larry Busacca/Getty Images For The Recording Academy)
Singer Whitney Houston performs onstage during the 2011 Pre-Grammy Gala & Salute to Industry Icons, with Clive Davis Honoring David Geffen at the Beverly Hilton on February 12, 2011. The event, on the eve of the 53rd Annual GRAMMY, honored Geffen Records founder and DreamWorks SKG co-founder David Geffen who was presented with the President's Merit Award in recognition of his significant contributions to the music industry and the impact his efforts have had on music and the business of music. AFP PHOTO / Mark RALSTON (Photo credit should read MARK RALSTON/AFP/Getty Images)
NEW YORK, UNITED STATES: Whitney Houston waves to the crowd at the 36th Annual Grammy Awards in New York 01 March 1994 after she was honored for Record of the Year, 'I'll Always Love You,' and Album of the Year, the soundtrack from the film 'The Bodyguard.' At rear is her producer David Foster, who shared the honors with her. (Photo credit should read POOL/AFP/Getty Images)
17 JUL 1994 : WHITNEY HOUSTON SINGS DURING THE CLOSING CEREMONY OF THE WORLD CUP BEFORE THE ITALY V BRAZIL 1994 WORLD CUP FINAL AT THE ROSE BOWL STADIUM IN PASADENA CALIFORNIA. Mandatory Credit: Billy Stickland/ALLSPORT
(FILES) US pop star and entertainer Michael Jackson (2R) gathers with Elizabeth Taylor (L), Liza Minnelli (2L) and Whitney Houston (R) at the United Nego College Fund dinner at a New York hotel March 10, 1988 in New York. Michael Jackson died on June 25, 2009 after suffering a cardiac arrest, sending shockwaves sweeping across the world and tributes pouring in on June 26 for the tortured music icon revered as the 'King of Pop.' AFP PHOTO/Mark CARDWELL (Photo credit should read MARK CARDWELL/AFP/Getty Images)
2/27/98 Los Angeles, CA. Whitney Houston at the 12th Annual Soul Train Music Awards. She recieved the Quincy Jones Award for 'Outstanding Career Achievement' in the field of entertainment.
Whitney Houston performs during the VH1 DIVAS LIVE '99 at the Beacon Theatre in New York on Tuesday, April 13. Other performers include Brandy, Tina Turner, and Cher, with a special performance by Elton John. Photo by Frank Micelotta/ImageDirect.
LOS ANGELES, UNITED STATES: Singers Mariah Carey (L) and Whitney Houston perform 'When You Believe' during the 71st Academy Awards 21 March 1999 at the Dorothy Chandler Pavilion. (ELECTRONIC IMAGE) AFP PHOTO Timothy A. Clary (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
Whitney Houston at the 2000 Grammy Awards held in Los Angeles, CA on Febuary 23, 2000 Photo by Scott Gries/ImageDirect
LOS ANGELES, UNITED STATES: (FILES): This 23 February 2000 file photo shows US pop diva Whitney Houston performing at the 42d Annual Grammy Awards in Los Angeles. Houston has checked into a drug rehabilitation clinic, her publicist said 16 March 2004, providing a new twist in her long battle with drug addiction. Houston, 40, has 'chosen to enter a facility for rehabilitation,' her publicist said in a terse statement that provided no further details of the type or location of the treatment, but which contained a message for her fans. 'She thanks everyone for their support and prayers,' the statement said. AFP PHOTO / FILES / Hector MATA (Photo credit should read HECTOR MATA/AFP/Getty Images)
BEVERLY HILLS, CA - FEBRUARY 12: (EXCLUSIVE COVERAGE) Singer Whitney Houston attends the 2011 Pre-GRAMMY Gala and Salute To Industry Icons Honoring David Geffen at Beverly Hilton on February 12, 2011 in Beverly Hills, California. (Photo by Larry Busacca/Getty Images For The Recording Academy)
BERLIN - MAY 12: US-American singer Whitney Houston performs live during a concert at the O2 World on May 12, 2010 in Berlin, Germany. The concert is part of the 2010 Nothing But Love tour to promote the album I Look To You. (Photo by Jakubaszek/Getty Images)
MILAN, ITALY - MAY 03: Whitney Houston performs at Mediolanum Forum on May 3, 2010 in Milan, Italy. (Photo by Vittorio Zunino Celotto/Getty Images)
WASHINGTON - JANUARY 16: Whitney Houston accepts the BET Honor for entertainment during the 2010 BET Honors at the Warner Theatre on January 16, 2010 in Washington, DC. (Photo by Kris Connor/Getty Images)
BEVERLY HILLS, CA - OCTOBER 28: Producer Clive Davis (L) and singer Whitney Houston arrive at the 17th Annual Mercedes-Benz Carousel of Hope Ball at the Beverly Hilton Hotel on October 28, 2006 in Beverly Hills, California. (Photo by Michael Buckner/Getty Images)
BEVERLY HILLS, CA - FEBRUARY 07: Singer Whitney Houston performs at the 2009 GRAMMY Salute To Industry Icons honoring Clive Davis at the Beverly Hilton Hotel on February 7, 2009 in Beverly Hills, California. (Photo by Kevin Winter/Getty Images)
LAS VEGAS, NV ? SEPTEMBER 15: Singer Whitney Houston is seen performing on stage during the 2004 World Music Awards at the Thomas and Mack Center on September 15, 2004 in Las Vegas, Nevada. (Photo by Kevin Winter/Getty Images)
US singer Whitney Houston attends in a welcoming ceremony as a guest of honor for the polygamous Black Hebrew sect 30 May 2003 in the southern Israeli town of Dimona. Houston is in Israel for a week to make a recording with the sect. AFP PHOTO/Tal COHEN ISRAEL OUT (Photo credit should read TAL COHEN/AFP/Getty Images)
DECATUR, GA - AUGUST 27: Singer Whitney Houston leaves the DeKalb County Courthouse after a probation violation hearing for her husband, singer Bobby Brown on August 27, 2003 in Decatur, Georgia. Brown was sentenced to 14 days in jail followed by 60 days of house arrest for violating conditions of his probation, stemming from 1996 DUI charges. (Photo by Frank Mullen/Getty Images)
LAS VEGAS - MAY 22: Actresses (L-R) Tia and Tamara Mowry with singer Whitney Houston attend the VH1 Divas Duets post concert party to benefit the VH1 Save the Music Foundation held at the MGM Grand Garden Arena on May 22, 2003 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images)
JERUSALEM - MAY 27: Israeli Prime Minister Ariel Sharon (R) welcomes singer Whitney Houston (L) and her husband/singer, Bobby Brown (C), at the prime minister's residence May 27, 2003 in Jerusalem, Israel. Houston is on a private tour of Israel. (Photo by Quique Kierszenbaum/Getty Images)
DECATUR, GA - NOVEMBER 25: Singer/actress Whitney Houston (L) smiles at her husband, singer Bobby Brown, during a court hearing November 25, 2002 in Dekalb County State Court in Decatur, Georgia. Brown was arrested on an outstanding bench warrant for a DUI arrest in 1996. Judge Wayne Purdom set a trial of January 21, 2003. (Photo by Erik S. Lesser-Pool/Getty Images)
Whitney Houston performing on the Michael Jackson '30th Anniversary Celebration, The Solo Years' concert at New York's Madison Square Garden, Friday, Sept. 7, 2001. Photo by Frank Micelotta/ImageDirect.