Singer Bobby Brown’s sister, Leolah is speaking out (again) regarding her thoughts on Bobbi Kristina‘s death.

Leolah recently appears on INSIDE EDITION where she states that she believes Bobbi Kristina Brown was murdered – and so was her mother, Whitney Houston.

[FLASHBACK: Leolah Brown Blasts Pat Houston for Wanting to Pull The Plug on Bobbi Kristina… ]

In an exclusive interview that aired last night, the older sister of Bobbi Kristina’s father Bobby Brown – spoke about losing her 22-year-old niece this summer.

I believe somebody killed my niece, just like they killed her mother.

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

More details + watch video of Leolah’s interview below…

“This was no accident,” she said. “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.”

In January, Bobbi Kristina was found face-down in a bathtub in the Georgia home she shared with her boyfriend Nick Gordon. Nearly six months later, she passed away in hospice care. Leolah told INSIDE EDITION that she believes Gordon is to blame.

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

Nick Gordon has never been arrested or charged in connection with Bobbi Kristina’s death. He has denied any wrongdoing.

Leolah continues:

“I believe that several people wanted Bobbi Kristina dead… I think the purpose of her death was to gain full access to Whitney Houston’s estate.”

Houston died of an accidental drowning in a Beverly Hills hotel room in February 2012, when she was 48.

“I believe that Whitney was murdered,” Leolah added. “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.”

Nick Gordon has denied allegations that he caused Bobbi Kristina Brown’s wrongful death as his attorney asks a court to dismiss the multi-million dollar lawsuit filed against him, calling the claims “slanderous and without merit.”

Gordon’s attorney has filed a response to the lawsuit filed by Bobbi Kristina’s conservator earlier this year. The suit from June, accused Gordon of Bobbi’s wrongful death. The lawyer’s response says that Gordon admits to arguing with Bobbi on the night of the incident.