Nick Gordon accused of injecting Bobbi Kristina Brown with 'a toxic mixture,' according to new court doc allegations

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Nick Gordon Accused of 'Injecting' Bobbi Kristina Brown With Toxic Mixture

A new accusation has surfaced in connection to Bobbi Kristina Brown's death, according to an ongoing $10 million wrongful death civil lawsuit filed against Brown's boyfriend, Nick Gordon.

According to a new court document obtained by ET, Brown's conservator, Bedelia C. Hargrove, alleges that "Ms. Brown died due to a violent altercation with Defendant (Gordon) after which he placed her in a bathtub, unconscious, after he injected her with a toxic mixture."

WATCH: Could Nick Gordon Be Facing Criminal Charges in Bobbi Kristina Brown Case?

A previous amendment to the initial lawsuit had alleged that Gordon gave Brown a "toxic cocktail rendering her unconscious," though there was no reference to an alleged injection.

Gordon has not been arrested in connection with Brown's death, and his lawyers previously called the initial "toxic cocktail" allegations "slanderous and meritless."

The new documents surfaced shortly after the Fulton County District Attorney filed a motion to seal Brown's autopsy, allegedly due to fears of a potential flight risk for defendants and possible harm to witnesses.

See images from Brown's funeral:

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Bobbi Kristina Brown's burial service
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Nick Gordon accused of injecting Bobbi Kristina Brown with 'a toxic mixture,' according to new court doc allegations
Carolyn Whigham leads Bobbi Kristina Brown's casket to a hearse after a service at Whigham funeral home in Newark, N.J., early Monday, Aug. 3, 2015. Bobbi Kristina, the only child of Whitney Houston and R&B singer Bobby Brown, died in hospice care July 26, about six months after she was found face-down and unresponsive in a bathtub in her suburban Atlanta home. (AP Photo/Mel Evans)
Carolyn Whigham leads Bobbi Kristina Brown's casket to a gold colored hearse after a service at Whigham funeral home in Newark, N.J., early Monday, Aug. 3, 2015. Bobbi Kristina, the only child of Whitney Houston and R&B singer Bobby Brown, died in hospice care July 26, about six months after she was found face-down and unresponsive in a bathtub in her suburban Atlanta townhome. (AP Photo/Mel Evans)
Guests leave Whigham Funeral Home following a service for Bobbi Kristina Brown on August 3, 2015 in Newark, New Jersey. Bobbi Kristina Brown, daughter of Whitney Houston and Bobby Brown, was reportedly found unconscious in her bathtub on January 31, 2015 and passed away on July 26, 2015 at the age of 22 after an extended hospital stay. (Photo by Dave Kotinsky/Getty Images)
Dionne Warwick arrives at Whigham Funeral Home to attend a service for of Bobbi Kristina Brown on August 3, 2015 in Newark, New Jersey. Bobbi Kristina Brown, daughter of Whitney Houston and Bobby Brown, was reportedly found unconscious in her bathtub on January 31, 2015 and passed away on July 26, 2015 at the age of 22 after an extended hospital stay. (Photo by Dave Kotinsky/Getty Images)
Guests leave Whigham Funeral Home following a service for Bobbi Kristina Brown on August 3, 2015 in Newark, New Jersey. Bobbi Kristina Brown, daughter of Whitney Houston and Bobby Brown, was reportedly found unconscious in her bathtub on January 31, 2015 and passed away on July 26, 2015 at the age of 22 after an extended hospital stay. (Photo by Dave Kotinsky/Getty Images)
The coffin of Bobbi Kristina Brown leaves Whigham Funeral Home following a service on August 3, 2015 in Newark, New Jersey. Bobbi Kristina Brown, daughter of Whitney Houston and Bobby Brown, was reportedly found unconscious in her bathtub on January 31, 2015 and passed away on July 26, 2015 at the age of 22 after an extended hospital stay. (Photo by Dave Kotinsky/Getty Images)
Guests leave Whigham Funeral Home following a service for Bobbi Kristina Brown on August 3, 2015 in Newark, New Jersey. Bobbi Kristina Brown, daughter of Whitney Houston and Bobby Brown, was reportedly found unconscious in her bathtub on January 31, 2015 and passed away on July 26, 2015 at the age of 22 after an extended hospital stay. (Photo by Dave Kotinsky/Getty Images)
Relatives leave the funeral services for Bobbi Kristina Brown at the Whigham Funeral Home on August 3, 2015 in Newark, New Jersey. Bobbi Kristina Brown, daughter of Whitney Houston and Bobby Brown, was reportedly found unconscious in her bathtub on January 31, 2015 and passed away on July 26, 2015 at the age of 22 after an extended hospital stay. (Photo by Bennett Raglin/Getty Images)
A police procession escorts a hearse containing Bobbi Kristina Brown's casket arrives at the Fairview Cemetery on August 3, 2015 in Westfield, New Jersey. Bobbi Kristina Brown, daughter of Whitney Houston and Bobby Brown, was reportedly found unconscious in her bathtub on January 31, 2015 and passed away on July 26, 2015 at the age of 22 after an extended hospital stay. (Photo by Michael Loccisano/Getty Images)
A hearse containing Bobbi Kristina Brown's casket arrives at the Fairview Cemetery on August 3, 2015 in Westfield, New Jersey. Bobbi Kristina Brown, daughter of Whitney Houston and Bobby Brown, was reportedly found unconscious in her bathtub on January 31, 2015 and passed away on July 26, 2015 at the age of 22 after an extended hospital stay. (Photo by Michael Loccisano/Getty Images)
A gold colored hearse carrying the coffin bearing the body of Bobby Kristina Brown drives past Saint James Church near Whigham Funeral home in Newark, N.J., early Monday, Aug. 3, 2015. Bobbi Kristina, the only child of Whitney Houston and R&B singer Bobby Brown, died in hospice care July 26, about six months after she was found face-down and unresponsive in a bathtub in her suburban Atlanta townhome. (AP Photo/Mel Evans)
A funeral cortege arrives ahead of a funeral service for Bobbi Kristina Brown at the Whigham Funeral Home on August 3, 2015 in Newark, New Jersey. Bobbi Kristina Brown, daughter of Whitney Houston and Bobby Brown, was reportedly found unconscious in her bathtub on January 31, 2015 and passed away on July 26, 2015 at the age of 22 after an extended hospital stay. (Photo by Dave Kotinsky/Getty Images)
A gold colored hearse carrying the coffin bearing the body of Bobbi Kristina Brown arrives with police escort to the back of Whigham Funeral home in Newark, N.J., early Monday, Aug. 3, 2015. Bobbi Kristina, the only child of Whitney Houston and R&B singer Bobby Brown, died in hospice care July 26, about six months after she was found face-down and unresponsive in a bathtub in her suburban Atlanta townhome. (AP Photo/Mel Evans)
A gold colored hearse carrying the coffin bearing the body of Bobby Kristina Brown arrives at Whigham Funeral home in Newark, N.J., early Monday, Aug. 3, 2015. Bobbi Kristina, the only child of Whitney Houston and R&B singer Bobby Brown, died in hospice care July 26, about six months after she was found face-down and unresponsive in a bathtub in her suburban Atlanta townhome. (AP Photo/Mel Evans)
An Essex Corrections pollce officer stands guard as a gold colored hearse carrying the coffin bearing the body of Bobby Kristina Brown arrives at Whigham Funeral home in Newark, N.J., early Monday, Aug. 3, 2015. Bobbi Kristina, the only child of Whitney Houston and R&B singer Bobby Brown, died in hospice care July 26, about six months after she was found face-down and unresponsive in a bathtub in her suburban Atlanta townhome. (AP Photo/Mel Evans)
A funeral cortege arrives ahead of a funeral service for Bobbi Kristina Brown at the Whigham Funeral Home on August 3, 2015 in Newark, New Jersey. Bobbi Kristina Brown, daughter of Whitney Houston and Bobby Brown, was reportedly found unconscious in her bathtub on January 31, 2015 and passed away on July 26, 2015 at the age of 22 after an extended hospital stay. (Photo by Dave Kotinsky/Getty Images)
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"The criminal investigation involving possible charges in this case is ongoing, no arrests have been made, and disclosure of the autopsy report and the above mentioned information at this time would compromise the integrity of the investigation and create risk of flight of possible defendants, and could pose a danger to witnesses involved in this case," the filing read. A judge granted the motion on Sept. 28.

WATCH: Nick Gordon Spotted Wearing Bobbi Kristina Brown's Engagement Ring After Her Death

On Jan. 31, Brown was found unresponsive in a bathtub in her home and was taken to North Fulton Hospital in Roswell, Georgia, where she was put on a ventilator to assist her breathing. She was later placed in a medically induced coma at Atlanta's Emory University Hospital. Nearly two months later, Brown was moved to a rehabilitation center, where she remained until June 24, when she was moved to a hospice center.

She died at Peachtree Christian Hospice in Duluth, Georgia on July 26 at 22 years old.

See images of Bobbi Kristina Brown:

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Bobbi Kristina Brown and Whitney Houston
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Nick Gordon accused of injecting Bobbi Kristina Brown with 'a toxic mixture,' according to new court doc allegations
(Photo via Getty)
Oct. 22, 2012 - New York, New York, U.S. - BOBBI KRISTINA BROWN attends the premiere party for the new reality show 'The Houstons: On Our Own' premiere party held at the Tribeca Grand Hotel. (Photo: Nancy Kaszerman/ZUMAPRESS.com via ALamy)
Entertainer Bobby Brown, right, stands outside of Emory Hospital in Atlanta where his daughter Bobbi Kristina Brown is being treated, Thursday, Feb. 5, 2015. Bobbi Kristina Brown, the only child of Bobby and the late Whitney Houston, has been hospitalized since Jan. 31 after being found unresponsive in a bathtub at a suburban Atlanta home. (AP Photo/Ron Harris)
FILE - In this Feb. 12, 2011, file photo, singer Whitney Houston, left, and daughter Bobbi Kristina Brown arrive at an event in Beverly Hills, Calif. Officers Wednesday morning, Nov. 28, 2012, responded to a call about a black Chevrolet Camaro that slid off the road and landed in a ditch in Alpharetta. They found 19-year-old Bobbi Kristina Brown standing beside her damaged car near her home. (AP Photo/Dan Steinberg, File)
LOS ANGELES, CA - JANUARY 25: Bobbi Kristina Brown wearing Carrera by Jimmy Choo sunglasses with the Solstice Sunglasses and Safilo USA display at the GRAMMY Gift Lounge during the 56th GRAMMY Awards at Staples Center on January 25, 2014 in Los Angeles, California. (Photo by Tiffany Rose/WireImage)
NEW YORK, NY - OCTOBER 22: Bobbi Kristina Brown attends 'The Houstons: On Our Own' series premiere party at the Tribeca Grand Hotel on October 22, 2012 in New York City. (Photo by Shareif Ziyadat/FilmMagic)
NEW YORK, NY - OCTOBER 22: Nick Gordon and Bobbi Kristina Brown attends 'The Houstons: On Our Own' series premiere party at the Tribeca Grand Hotel on October 22, 2012 in New York City. (Photo by Shareif Ziyadat/FilmMagic)
Oct. 22, 2012 - New York, New York, U.S. - BOBBI KRISTINA BROWN attends the premiere party for the new reality show 'The Houstons: On Our Own' premiere party held at the Tribeca Grand Hotel. (Credit Image: © Nancy Kaszerman/ZUMAPRESS.com)
Aug. 16, 2012 - Los Angeles, California, U.S. - Bobbi Kristina Brown attending the Los Angeles premiere of ''Sparkle'' held at the Grauman's Chinese Theatre in Hollywood, California on August 16, 2012. 2012(Credit Image: © D. Long/Globe Photos/ZUMAPRESS.com)
Singer Whitney Houston, right, sings with her daughter Bobbi Kristina Brown during a performance for 'Good Morning America' in Central Park on Tuesday, Sept. 1, 2009 in New York. (AP Photo/Evan Agostini)
GOOD MORNING AMERICA - 9/1/09 One of the most honored female artists of all time, Whitney Houston is making her first television appearance in over seven years on GOOD MORNING AMERICA, WEDNESDAY, SEPT. 2 (7-9 a.m., ET) on the ABC Television Network. Her free performance was taped in New York City's Central Park, 9/1/09. GM09 (Photo by Ida Mae Astute/ABC via Getty Images) WHITNEY HOUSTON joined onstage by daughter BOBBI KRISTINA
Singer Whitney Houston, right, sings with her daughter Bobbi Kristina Brown during a performance for 'Good Morning America' in Central Park on Tuesday, Sept. 1, 2009 in New York. (AP Photo/Evan Agostini)
Actress Lauren Bacall, left, greets Bobbi-Christina daughter of Bobby Brown, right, and Whitney Houston during the 4th Annual International Achievement In Arts Awards in Beverly Hills, Calif., Sunday, Oct. 11, 1998. The award show was to benefit the Whitney Houston For Children, Inc. and the Starkey Hearing Foundation. (AP Photo/Michael Caulfield)
Whitney Houston, right, thanks the crowd after being honored with a lifetime achievement award at the first BET awards Tuesday, June 19, 2001, at a hotel in Las Vegas. The BET Awards are given to black entertainers and athletes in music, film and sports categories. The 15 awards were voted by record label executives, media and fans. Her mother, Cissy Houston, left, and her daughter, Bobbi Kristina Brown, center, presented her award. (AP Photo/Joe Cavaretta)
US singer Whitney Houston and her huband bobby Brown attend welcoming ceremony hosted by 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 MEIR AZULAI ISRAEL OUT (Photo credit should read MEIR AZULAI/AFP/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)
Whitney Houston and Bobby Brown at event, New York, 1998. (Photo by Steve Eichner/Getty Images)
NEWARK, NJ - FEBRUARY 17: A view outside New Hope Baptist Church, one day before Whitney Houston funeral service on February 17, 2012 in Newark, New Jersey. PHOTOGRAPH BY Laurentiu Garofeanu / Barcroft USA /Barcoft Media via Getty Images
LOS ANGELES, CA - JANUARY 25: Bobbi Kristina Brown and Nick Gordon attends the GRAMMY Gift Lounge during the 56th Grammy Awards at Staples Center on January 25, 2014 in Los Angeles, California. (Photo by Tiffany Rose/WireImage)
LAS VEGAS, NV - MAY 20: (EXCLUSIVE COVERAGE) Pat Houston (L) and Bobbi Kristina Houston-Brown accept the Millennium Award on behalf of Whitney Houston onstage at the 2012 Billboard Music Awards held at the MGM Grand Garden Arena on May 20, 2012 in Las Vegas, Nevada. (Photo by Christopher Polk/Billboards2012/Getty Images for ABC)
LAS VEGAS, NV - MAY 20: (EXCLUSIVE COVERAGE) Pat Houston (L) and Bobbi Kristina Houston-Brown accept the Millennium Award on behalf of Whitney Houston onstage at the 2012 Billboard Music Awards held at the MGM Grand Garden Arena on May 20, 2012 in Las Vegas, Nevada. (Photo by Ethan Miller/Billboards2012/Getty Images for ABC)
SAM REMO, ITALY - FEBRUARY 8: Whitney Houston attends The San Remo Pop Festival, on February 8, 1987 in San Remo, Italy. (Photo by Julian Parker/UK Press via Getty Images)
Daily News front page February 12, 2012, Headline: WHITNEY DEAD Found in L.A. hotel room. Whitney Houston (Photo By: /NY Daily News via Getty Images)
Daily News front page February 19, 2012, Headline: WHITNEY GOES HOME 'Singing With Angels' Whitney Houston funeral (Photo By: /NY Daily News via Getty Images)
Singer Whitney Houston. (Photo by Time Life Pictures/DMI/The LIFE Picture Collection/Getty Images)
Actress Dawn Lewis, singer Whitney Houston and Reverend Jesse Jackson attend the ''Sammy Davis, Jr. 60th Anniversary Celebration' Television Special on November 13, 1989 at Shrine Auditorium in Los Angeles, California. (Photo by Ron Galella, Ltd./WireImage)
NEW YORK, NY - OCTOBER 22: Nick Gordon and Bobbi Kristina Brown attends 'The Houstons: On Our Own' series premiere party at the Tribeca Grand Hotel on October 22, 2012 in New York City. (Photo by Shareif Ziyadat/FilmMagic)
American singer Whitney Houston, June 1988 (Photo by RDA/Getty Images)
(EXCLUSIVE, Premium Rates Apply) Whitney Houston and Bobby Brown (Photo by L. Cohen/WireImage)
Married singers Whitney Houston and Bobby Brown. (Photo by Time Life Pictures/DMI/The LIFE Picture Collection/Getty Images)
TAMPA, FL - JANUARY 27: Whitney Houston sings the National Anthem during the pregame show at Super Bowl XXV while tens of thousands of football fans wave tiny American flags in an incredible outburst of patriotism during the Persian Gulf War on 01/27/1991. (Photo by Michael Zagaris/Getty Images)
NEWARK, NJ - FEBRUARY 14: Mourners leave messages outside New Hope Baptist Church on February 14, 2012 in Newark, New Jersey. Whitney Houston's body is being held at Whigham Funeral Home before the funeral on Saturday at New Hope Baptist Church. PHOTOGRAPH BY Laurentiu Garofeanu/ Barcroft USA /Barcoft Media via Getty Images
LOS ANGELES, CA - JANUARY 25: Bobbi Kristina Brown wearing Carrera by Jimmy Choo sunglasses with the Solstice Sunglasses and Safilo USA display at the GRAMMY Gift Lounge during the 56th GRAMMY Awards at Staples Center on January 25, 2014 in Los Angeles, California. (Photo by Tiffany Rose/WireImage)
NEW YORK, NY - OCTOBER 22: TV Personality Bobbi Kristina Brown attends 'The Houstons: On Our Own' Series Premiere Party at Tribeca Grand Hotel on October 22, 2012 in New York City. (Photo by Jim Spellman/WireImage)
NEW YORK, NY - OCTOBER 22: Singer Cissy Houston and TV Personality Bobbi Kristina Brown attend 'The Houstons: On Our Own' Series Premiere Party at Tribeca Grand Hotel on October 22, 2012 in New York City. (Photo by Jim Spellman/WireImage)
Bobbi Kristina Brown, right, and Nick Gordon attend the Los Angeles premiere of "Sparkle" at Grauman's Chinese Theatre on Thursday, Aug. 16, 2012, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)
Bobbi Kristina Brown attends the Los Angeles premiere of "Sparkle" at Grauman's Chinese Theatre on Thursday, Aug. 16, 2012, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)
Whitney Houston and Bobby Brown at the Metropolitan Museum's Costume Institute gala exhibition, New York, New York, December 6, 1999. (Photo by Steve Eichner/Getty Images)
Whitney Houston at the Metropolitan Museum's Costume Institute gala exhibition, New York, New York, December 6, 1999. (Photo by Steve Eichner/Getty Images)
CANADA - AUGUST 22: Whitney Houston (Photo by Ron Bull/Toronto Star via Getty Images)
Married singers Bobby Brown and Whitney Houston. (Photo by Time Life Pictures/DMI/The LIFE Picture Collection/Getty Images)
NEW YORK CITY - NOVEMBER 5: Singer Whitney Houston attends the press conference to announce her new album 'My Love is Your Love' on November 5, 1998 at Sony Music Studios in New York City. (Photo by Ron Galella, Ltd./WireImage)
Singer Whitney Houston (R) and her husband singer Bobby Brown (L) arrive at the 50th Annual Primetime Emmy Awards 13 September at the Shrine Auditorium in Los Angeles, CA. AFP PHOTO Lucy NICHOLSON/mn (Photo credit should read LUCY NICHOLSON/AFP/Getty Images)
Mariah Carey and Whitney Houston (Photo by Jeffrey Mayer/WireImage)
FRANCE - JULY 06: Concert Of Whitney Houston At Bercy in Paris, France on July 06, 1998. (Photo by Alain BENAINOUS/Gamma-Rapho via Getty Images)
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