Dr. Conrad Murray's attorney brought in an expert witness to argue that Michael Jackson was responsible for his own death.

In a report by the Associated Press, the defense team used key scientific witness Dr. Paul White to testify that Jackson gave himself an injection of Profonol after Murray's initial dose wore off.

He also calculated that Jackson took Lorazepam pills in addition to the other medications Murray gave to help him sleep. The combination of these drugs could have had "lethal consequences," they said.

White showed the jurors a chart and simulations which he created to help the defense team. He also said that he believed Murray's statement that the doctor only injected 25 milligrams of Profonol to Jackson, helping the insomniac singer get some sleep.

"How long would that [Profonol] have had an effect on Mr. Jackson?" asked J. Michael Flanagan, defense attorney.

"If you're talking effect on the central nervous system, 10 to 15 minutes max," White said. The doctor said the singer might have injected himself of Profonol by the time Murray said he left the room.

"So you think it was self-injected Profonol between 11:30 and 12?" the defense attorney asked.

"In my opinion, yes," White concluded.

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