Bobbi Kristina Brown’s former roommate, Mason Whitaker, claims that a “bad batch” of heroin likely led to the death of the only daughter of Bobby Brown and the late Whitney Houston, the Inquistr reported Friday. Bobbi Kristina died July 26 at the age of 22 after remaining in an unresponsive state at several medical facilities since Jan. 31.

Whitaker has accused Bobbi Kristina’s friends, Danyela Bradley and Maxwell Lomas, of getting her addicted to drugs a month before she was found facedown at her Atlanta home in January. He also claimed that Bobbi Kristina's boyfriend, Nick Gordon, was involved in a cover-up to make the whole scenario look like an accident. Gordon is facing a lawsuit filed by Bobbi Kristina's legal conservator Bedelia Hargrove. In an amended filing last week, Hargrove revealed that Gordon gave Bobbi Kristina a "toxic cocktail" and then put her facedown in a bathtub. A criminal investigation is underway into Bobbi Kristina's death.

“And I’m not going to stop talking about Max or Danyela!! If you knew real facts about the case, you would know that Max and Danyela convinced Krissi to start shooting up…  And Max and Danyela gave her bad heroine to shoot after nick beat her up. And that Max, Nick, and Danyela all tried to cover up the scene and make it look like an accident and didn’t call the police until about 20 minutes after she was dead. These are all facts and I’m not going to stop voicing any of that until there is justice for my sister and all 3 of them go down for this (which they will)," Whitaker reportedly wrote on his Facebook page.

Whitaker also revealed that Bobbi Kristina's aunt, Pat Houston, allegedly asked both Bradley and Lomas to hold Gordon responsible for the 22-year-old's death.

“And if you knew anything about the real facts of this case, you’d know that Pat told Max and Danyela that she would pay them 'X' amount of money and be able to pay off the DA to have immunity if they made up a story that it was only Nick who killed her," Whitaker added in the post.

In June, a new book titled, "Whitney & Bobbi Kristina: The Deadly Price of Fame," claimed that Bobbi Kristina was addicted to drugs at the age of 14.

In April, Gordon's brother, Jack Walker, alleged during an interview, that Bobbi Kristina and Gordon began using drugs at home with the late Whitney Houston.

In March, Stephen Stepho -- a friend of Bobbi Kristina from high school -- claimed that the aspiring actress and Gordon used heroin, Xanax, marijuana and Roxicodone (a prescription narcotic) on a daily basis, according to The Sun.

However, a preliminary autopsy on Bobbi Kristina showed no significant injuries or obvious cause of death. She was buried next to her mother -- who also died under similar circumstances in 2012 -- on Aug. 3 at Fairview Cemetery in Westfield, New Jersey.