Bobbi Kristina Brown's aunt, Leolah Brown, claims that her niece's death was likely the result of foul play.
"This was no accident," said Leolah during an exclusive sit down with Inside Edition, airing on Wednesday. "I will never believe this was an accident."
Leolah added that she has similar thoughts about Whitney Houston's death three years earlier as well.
WATCH: Bobbi Kristina's Aunt Leolah Brown Exits Funeral After Outburst
"I believe somebody killed my niece, just like they killed her mother," she said. "I don't know who actually murdered Whitney."
Earlier this year, Bobbi Kristina's court-appointed conservator, Bedelia Hargrove, filed a lawsuit against Bobbi Kristina's boyfriend, Nick Gordon, which included a wrongful death accusation.
The lawsuit claimed that after a late-night "cocaine and drinking binge," Nick "gave Bobbi Kristina a toxic cocktail rendering her unconscious and then put her face down in a tub of cold water causing her to suffer brain damage."
MORE: Bobbi Kristina's Aunt Seeks 'Justice' for Her Niece
Despite the accusations, Nick has never been arrested or charged in connection with Bobbi Kristina's death and he categorically denies any wrongdoing.
Nick's lawyers released a statement to ET regarding the lawsuit filed against their client, claiming it is both "slanderous and meritless."
MORE: Lawsuit Claims Nick Gordon Assaulted Bobbi Kristina Brown, Stole Thousands From Her
"Nick has been heartbroken and destroyed over the loss of his love and it's shameful that such baseless allegations have been presented publicly," the statement reads. "Nick has engaged civil counsel and intends to defend the lawsuit vigorously and expose it for what it is: a fictitious assault against the person who loved Krissy most."
Meanwhile, during Bobbi Kristina's funeral on Aug. 1, Leolah was seen leaving the ceremony early after scolding Whitney's sister-in-law, Pat Houston, who was making her way up to the podium to speak. Early reports said that Leolah was thrown out of the memorial service, but Leolah denies these claims.
"I walked out a little early, because I couldn't take it anymore," Leolah said.
MORE: Leolah Brown Denies She Was Kicked Out of Bobbi Kristina Brown's Funeral
According to Leolah, what led to her outburst was her belief that "Krissy was surrounded by people that cared nothing for her."
"I got up and when I saw Pat making her way to the podium to speak, I turned and looked at Pat and I said, 'This is wrong. You know you're wrong for this.' I said, 'Whitney will haunt you from the grave,'" she added.
Whitney's death was ruled an accidental drowning after the 48-year-old music icon was found in a bathtub at the Beverly Hilton in Feb. 2012. Likewise, Bobbi Kristina was found unresponsive in a bathtub at her Georgia home on Jan. 31. She was later placed in a medically-induced coma and died on July 26.
Tune in to Inside Edition tonight for more.