Michael Jackson's Time of Death in Question

I have had my suspicion of this doctor because of the timeline in which the doctor called 911 on Jackson. Here is the latest:

TMZ:

Law enforcement sources tell TMZ Dr. Conrad Murray was not in Michael Jackson's room when his heart stopped.

As we first reported, authorities believe Jackson died from an overdose of the powerful anesthesia Propofol. Sources say the LAPD believes Dr. Murray may have administered it.

This raises an even bigger question. Dr. Murray called 911 at 12:21 PM. He says he discovered Jackson in distress a half hour before. But why, then, did Dr. Murray's employees make a sudden trip to the Dr.'s storage facility in Houston at 9:22 AM Los Angeles time? Could Jackson have been lifeless hours before the 911 call?

We're told by the storage facility manager the women who picked up 3 to 5 boxes became nervous when the manager began questioning them about why they were there.

Late Update: Hidden Drug Stash Found in Jackson's House--where Dr. Murray was staying

Sources say when the LAPD first searched Jackson's home the night he died, they did not turn up Propofol or many of the other drugs that were in Jackson's house.

Dr. Murray talked to the LAPD the following Saturday and the information he supplied triggered another, broader search warrant. Cops returned to the house the following Monday and discovered "various drugs" secretly stashed in a closet in the guest room where Dr. Murray was staying.

Here's the amazing thing ...law enforcement sources say Dr. Murray himself told LAPD detectives about the closet when he was interviewed the Saturday after Jackson's death.

One law enforcement source says: "The drugs were concealed...they weren't obvious." Among the stash -- Propofol, the drug authorities believe killed Michael Jackson.