Just when you thought things couldn't get any worst, a top private investigator is claiming that Whitney Houston was murdered and he has a video evidence to prove it.

According to the Inquistr, Paul Huebl said Houston’s death, which was originally ruled an accidental drowning – contributed to by a heart disease and cocaine use — was actually a drug-related homicide.

“I have evidence that points to Whitney being a victim of high powered drug dealers who sent thugs to collect a huge debt she owed for drugs,” Huebl said.

The private investigator also said Houston’s body showed signs of defense wounds “that would have occurred while she was battling for her life.”

Huebl is reportedly turning his evidence over to the FBI and is hoping to get their assistance in proving that Houston’s death was murdered.

Huebl said two unidentified men kept showing up to the hotel where Houston was staying at the time of her death. He said one or both men were caught on video entering her room during the 45 minutes she was alone before being discovered by her bodyguard.

He also said the day before she died, Houston was overheard saying, “I’m tired of this sh*t” after receiving a cocaine delivery. Huebl said she uttered the statement because she was being harassed for a supposed $1.5 million drug debt.

Houston’s sister-in-law, Pat, originally claimed that the singer was killed, saying she “had no idea how she got there [in the tub.]” Pat Houston later retracted her claim that the superstar’s death was part of a murder conspiracy.

The details of Huebl’s claims will be published in Thursday’s National Enquirer.