Did Dr. Conrad Murray Cover Up Evidence?

Dr. Conrad Murray may have hidden and tried to cover up the means by which Michael Jackson died on June 25, according to law enforcement sources.

MJ received his final, fatal dose of Propofol through an IV in his leg, and Murray told cops he administered only a very small amount of Propofol: 2.5ml.

But Dr. John Dombrowski, a noted anesthesiologist who reviewed the LAPD file for detectives, tells TMZ that 2.5ml couldn't even put Jackson to sleep.

Let alone kill the man.

The autopsy report, to that end, notes the level of Propofol found in Jackson was equivalent to what is found in "general anesthesia for major surgery."

So what is Conrad Murray not saying?

A small, empty, 20 ml bottle of Propofol was found in the bedroom, but a secret compartment in a nearby closet contained numerous bottles of Propofol as well.

Along them? A large, empty, 100ml bottle with a large tear in the rubber stopper. A tear in the stopper is made to connect an entire bottle of Propofol to the IV.

If this is done, the doctor must use an infusion pump to regulate the flow of Propofol, or else the patient could easily OD. There was no infusion pump found.

Law enforcement sources believe Dr. Murray may have used the 100 ml bottle, then either tried regulating the flow by eyeballing it or letting it flow by itself.

Either way, that would be reckless, as Dr. Murray himself said he left to go to the bathroom at one point (see related Michael Jackson death timeline dispute).

If Dr. Murray did indeed empty the full 100 ml bottle into Jackson's system, that would be 40 times more Propofol than the physician said he administered.

No word if the prosecution plans to argue this in Dr. Murray's involuntary manslaughter case. The doctor has been charged, pending a preliminary hearing.