The outspoken sister of Bobby Brown, Leolah Brown, is now sharing she believes niece Bobbi Kristina Brown was murdered as was her mother, Whitney Houston.

In an exclusive interview with "Inside Edition, Leolah Brown said, "This was no accident. I will never believe this was an accident. I believe that somebody killed my niece, just like they killed her mother. I don't know who actually murdered Whitney."

But when it comes to Bobbi Kristina, in Leolah Brown's mind, there is no such ambiguity, as she fingers her niece's live-in boyfriend Nick Gordon as her suspected culprit.

"Nick murdered Bobbi Kristina," she said. "When Nick gets arrested, I think everything will fall like dominoes."

Bobbi Krisitna died under hospice care in late July, some six months after she was found faced down in the bathtub of the home the two shared near Atlanta. She never regained consciousness after being rushed to a hospital emergency room and has since been buried alongside her mother at a New Jersey cemetery.

"I believe that several people wanted Bobbi Kristina dead," Leolah Brown said. "I think the purpose of her death was to gain full access to Whitney Houston's estate."

The 25-year-old Gordon now faces a multimillion dollar wrongful death suit filed by the conservator of Bobbi Kristina's estate Bedelia C. Hargrove, alleging in the hours before she was rushed to the emergency room, he gave her a "toxic cocktail" that essentially rendered her defenseless.

Through his attorneys, Gordon has denied all the allegations, though he admits he and his girlfriend violently argued on the night in question. Throughout her hospitalization, Gordon was banned by Brown and Houston family members from visiting his girlfriend and was not allowed to attend formal services for her.

Whitney Houston died of an accidental drowning in a Beverly Hills hotel just over three years prior to her daughter's death.

"I believe that Whitney was murdered," Leolah Brown said.

"At some point we have to wake up and realize this is too close, too similar -- mother, daughter, both in bathtubs. ... Something is very, very wrong with that picture."