Private investigator:Whitney Houston was murdered

Though medical examiners ruled that Whitney Houston drowned accidentally after taking some hard drugs,  A Hollywood private investigator,Paul Huebi,  says he has 'video evidence' that singer Whitney Houston was murdered.

Huebl says he obtained surveillance video that shows two unknown men who repeatedly went to the Beverly Hilton and integrated themselves into Houston's entourage. 

The private investigator claims these are the men who may have slipped into Houston's hotel room and killed her. 

He also disagrees with the Los Angeles County Coroner's ruling that the star's death was 'accidental.'

'Whitney’s body shows classic defense wounds that would have occurred while she was battling for her life,' he said.

However, Huebl conceded that the marks on her hands and fingernails could have been obtained in some other ways and that they were only 'suspected' defensive wounds. 

The private investigator said he also has evidence that Houston's hotel room was ransacked, showing further hints of a violent struggle.

Huebl says he gave his evidence to the Chicago field office of the FBI in the hopes that the agency will open a criminal investigation.

Huebl believes the troubled star was targeted by several 'high powered drug dealers who sent thugs to collect a huge debt she owed for drugs.'

She owed $1.5million to dealers, according to some reports