Whitney Houston death report

These days i read a lot about Whitney Houston death report. A lot of websites and radio stations have the rumor that she died from a heart atack, because she mixed two drugs in large quantities with alcohol. If this is true than she took this drugs from a reason of depresion because these two drugs Valium and Xanax is given to depresion patients.
In the report stays that when she was found dead she was in a bathtub with her head in water.
Will we ever found the true reason for the death ... or it will be a mystery ....
Say you opinion below in comments ...