Bobbi Kristina Brown’s boyfriend, Nick Gordon, could get a chance to visit his girlfriend if he passes a polygraph test, Ian Halperin, author of the controversial book titled, "Whitney & Bobbi Kristina: The Deadly Price of Fame,” told The Wrap on Thursday. Gordon has not been allowed to see the 22-year-old yet because her family suspects him of foul play.

“If Nick Gordon agrees to take a polygraph and answers the questions about what happened that night, and if he passes the polygraph with a high accuracy rate, I know I can get him access to see Bobbi Kristina,” Halperin reportedly said. His comments come just days after he released the book on the aspiring actress and her late mother Whitney Houston's alleged drug abuse. The investigative journalist also wrote about Gordon in a negative light, citing a source, who claimed that Bobbi Kristina was afraid of Gordon.

Halperin reportedly said that he has made arrangements with a polygraph expert -- “one of the world’s leading polygraph examiners” -- to administer Gordon's test, adding that he knew someone who is “good friends” with Bobbi Kristina’s father, Bobby Brown.

“I’ve contacted this person, and they’ve agreed: If Gordon passes the polygraph and it all checks out, they’ve agreed to present it to Bobby Brown and to try to get him to let Nick Gordon see Bobbi Kristina, and I think that’s fair,” Halperin told The Wrap. However, it could not be confirmed if Gordon has agreed to take the test.

Gordon’s several pleas to the Browns and the Houstons for permission to see Bobbi Kristina at the hospital have been rejected by both the families. The 25-year-old’s girlfriend remains in an unresponsive condition at a hospital since she was found face-down in a bathtub at her Atlanta home on Jan. 31.

A criminal investigation is ongoing in the case after injury marks were found on her body. Police have so far not named or charged anyone in the case. However, many consider Gordon to be a suspect after reports emerged of a history of violence in the Bobbi Kristina-Nick Gordon relationship.

Halperin reportedly believes that the feud between Gordon and the Browns could be resolved if he can prove his innocence via the polygraph test.  

“That’s the only reason that they’re denying him access, because they’re worried about his suspicious role,” Halperin told The Wrap. “A lot of the Browns are convinced that Nick Gordon possibly was involved in what happened.” Gordon only needs to prove that “he had no involvement and he didn’t have any criminal involvement” in Bobbi Kristina’s incident, he added.

“If he’s telling the truth, I think Bobby Brown‘s open and a good guy and smart enough to realize that it’s time to let him see Bobbi Kristina,” Halperin said.

Halperin’s book claims that Bobbi Kristina was a “wild child” and a drug addict before she turned 15. A neighbor, cited by Halperin, reportedly said that Bobbi Kristina “was always high on something” but mostly looked like she was high “on heroin.”