Whitney Houston's drug dealer eliminated all traces of cocaine from singers room after finding her drowned in the bath, according to reports.
The Coroner's Office say Whitney used cocaine 'not probably too much before she collapsed.'
Yet no traces of any illegal drugs were found in her hotel room when investigators conducted their search, it's also being claimed that bed sheets were missing.
It is being claimed by TMZ that Beverly Hills Police Department haven't closed the case and are investigating it as a case of evidence tampering.
They add that: 'One source who is extremely close to the situation tells us, the individual who removed the cocaine was also the person who supplied it to Whitney.'
Meanwhile Houston's on-off boyfriend has vehemently refuted claims made by Bobby Brown's sister that he enabled the late Whitney Houston's use of the drug.
A spokesperson for Ray J slammed the allegations made by Leolah Brown on HLN's Dr. Drew show that the 31-year-old may have provided the late star with the drugs that contributed to her tragic February 11 death, saying her interview was 'rife with false statements.'
And according to TMZ, singer Brandy's younger brother had 'no knowledge' that the diva was even using the drug.