According to TMZ.com, the LAPD don’t believe that Michael Jackson’s personal physician, Dr. Conrad Murray, told the truth when he said he administered a small dosage of the sedative Propofol (Diprivan) to Jackson.

The LAPD met with Dr. Murray on two occasions after Jackson died of a cardiac arrest in his rented mansion on June 25th.

In the police search warrant affidavit, Dr. Murray told police he gave Jackson 25mg of Propofol before Jackson stopped breathing. Murray said he normally gave Jackson 50mg of Propofol, but he decreased the dosage because he feared Jackson was becoming addicted.

Online reports attributed Jackson’s death to a “lethal amount” of Propofol. The problem is the dosage of 25mg of Propofol listed in the police report is too small to cause death. An average maintenance dosage to adequately sedate an adult for hours is about 400mg (or more) per hour.

Now the police are backtracking and saying they believe Dr. Murray lied about the amount of Propofol he gave Jackson. But that amount is written in stone in the police affidavit. And you can bet that the defense attorneys for Dr. Murray will be all over that affidavit. So if Dr. Murray walks, the LAPD have no one to blame but themselves.