At this point, I believe NOTHING I hear on CNN. You do realize that "the source" for a lot of this is Ian Halperin, right? I will not believe about the drugs unless/until a toxicology report is made public. Remember the vast amount of tabloid-type misinformation during the trial? This is more of that same garbage. Just because it's in print or on the air, does not make it factual.
If this was a "crime scene," then the LAPD took down the caution-tape too soon and allowed access to a lot of people. Anything found after the tape went down, could have been planted.
Follow the MONEY. To whom was Michael more valuable dead than alive? Who had insurance policies on him, and for how much? WHO will cash-in? Follow the money in the coming days/weeks. Therein will be the answer, I think. . . . . . .